Malicious PDF — malware analysis report

Static analysis result for SHA-256 105e5ca054784d44…

MALICIOUS

PDF

91.1 KB Created: 2021-07-02 10:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ae53fc2eb69832165ab284ad9d536792 SHA-1: 717055282dc4d4386313960850d1e3cadfb49715 SHA-256: 105e5ca054784d44ab6e539479f5d02d70ddd7ab05304ba52c16386ba937319c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. The 'SE_MFA_LURE' heuristic indicates the document is designed to harvest credentials or abuse multi-factor authentication. The numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggest a phishing or credential harvesting campaign. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://nhsclassof77.com/clients/c/ca/caa0b9827732345dad94809623212052/File/97080632038.pdf In PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a03e8e0b7---metafofodivugugopod.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/83583150862.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/17519361897.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/4079874151.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b82f6ec2f8f---junodomowavuxoparojisoti.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9dee071c1---71912038855.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d73ae73c8d6---66205951534.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9eb99da1bc---6992596667.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/r37th1vp5orkiq141s01icvhep/ruveduxi.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/cdf9e04045aac8eb5be618d2db231e99/46078054282.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cda174d68---12660526976.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aec623b73c---xetuxuwerunuximiwatire.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/17137086933.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860f1a1d82d---wiripivogofusoziwu.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/3fe29984376f64b0ab1168cd6703c268/nafujiduzutavukamowul.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/b6bb66b534930726cd0669ef82d20d0c/molukodeji.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609bee42908a9---xarajipikof.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073e257a97c3---guriwedomabolapubudulik.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/339dea00a56f6c66f1756e6ef91fab48/zibedozu.pdfIn PDF document text
    • https://liderpin.com/calisma2/files/uploads/wewutawutexolumo.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2f5d51282---33461330590.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/66b38ffc8aca264d2ea9c9fcbc97f8e4/sijiderarewuxojuvofiz.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/0070c5eab614178aee69af07d94bca33/vowaxedenudigavuliwed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=helicobacter+associated+gastritis+icd+10PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001008f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008F 10744 bytes
SHA-256: 1cc0d380c1838c9a1f2dba8a297af5c74fcec858a184c77d502316301b4bdf6a
font_01_sfnt_off0001192d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001313f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1313F 17576 bytes
SHA-256: cb5bdc00f1ac078b68d58b93fef4e718f245256c703872180f0535ac0e1c31eb

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