Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fdaf5d60023b6e5…

MALICIOUS

PDF

74.4 KB Created: 2021-07-30 23:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 58575d48361e4abd6bc621199beb32b5 SHA-1: d022429c9a1318054a05d761ac5e789cf0310225 SHA-256: 5fdaf5d60023b6e53b5912a8bc0bebe1c99110945e87b757db7f17d813c33173
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://allytemp.ru/uplcv?utm_term=manual+de+an%C3%A1lise+de+dados+pdf+download PDF link annotation
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07752562d7---titakegi.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/kaxovemixi.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/9df60d4420965a02953f590b83f95f3f/jasexa.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/4c265dcb1ecf075ffb6852d42abafd44/suwilegi.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/at02cbqhd3i9fg8eqb72d6ae4v/49887290603.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609479659e3ee---pijivuxidoxu.pdfIn PDF document text
    • https://maisonforville.be/documents/file/29255494226.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/24272581bdc7c2b842f9f9ec024c541e/75813391601.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb158483d9b---xibawinatizakun.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c887e307a6---92379656643.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb2965b367---98314335493.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074c3ab78f02---12698750397.pdfIn PDF document text
    • http://stadiumhighschoolclassof1965.com/clients/0/00/0080f9a3d0f10e930bcfc39f0a940e94/File/vakinewaxu.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/xedonedana.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/newuloporuvunijaju.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/gixopozaxulugimuze.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/29183774874.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/50233800604.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/ae4d61a8a076e41f6c59a7441532d7cc/39279002163.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/43029681888.pdfIn PDF document text
    • http://brookhavenclassof1967.com/clients/0/0c/0ca802fc87877f8c548ddf85495caeb2/File/kobaju.pdfIn PDF document text
    • 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_off0000bcd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F0 10652 bytes
SHA-256: 3bf8693892335ed259f9998502d740b759436b84b3d04905736aab21f736747c
font_02_sfnt_off0000ed04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED04 18492 bytes
SHA-256: 94d01da9f3f92140a25d0e6825070c1930216617181926fba06e195f3f7d223d

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