Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea1a62da1d41a2ba…

MALICIOUS

PDF

96.9 KB Created: 2021-06-26 11:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 61bcaa1e630f98a5d2068a64e4d24486 SHA-1: e84519d797c318ef1bb6bf4c86c4c53a391ba147 SHA-256: ea1a62da1d41a2ba12e9f5677471358e7777091de5d0a489119c8a6663e860f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

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 http://the100voicesofgospel.de/fichiers/newsletter/file/81789312649.pdf In PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895a8744020---22546344986.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/43444235169.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160856c041725f---48692194184.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/zaxekeduzetatuso.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9e139b318---zefiv.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/nomexoxu.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f16b2b8b61---80068340354.pdfIn PDF document text
    • http://zlato-invest.cz/upload/files/98662252311.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/fe4b7e1201acc259fe4aff7eaaaae7a9/pijexu.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0094560af1---buzojuruzixoleboligar.pdfIn PDF document text
    • https://aspirans.com/files/file/logavitofeg.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bcba9051e4c---61811510578.pdfIn PDF document text
    • http://apcmagon.com/userfiles/30135906108.pdfIn PDF document text
    • http://sns.hu/_user/file/77439743495.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/b456eb48bd057984461f986440d5ac28/59868033438.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae9f6a7b02---34995822842.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc3c1197ac---46120268601.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd947d7848---dimaza.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca5209ba6c---lewetikudukikavefulomaxi.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607090a7d2491---53889605150.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738429f1164---janux.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/wavusokalibubuvasalerom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=ithaqua+idle+heroes+tier+listPDF 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10276 10436 bytes
SHA-256: 48ae37b4a5fc70387158befbb019f27adf29d89970bc6336bbc7503985f34c60
font_01_sfnt_off00011a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A02 17368 bytes
SHA-256: e993254e0074c26810c6ee18353bdecd3e1f2501dd856a810af9206eb4567d69
font_02_sfnt_off00014778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14778 16588 bytes
SHA-256: ebbf6a75d716c8d492e4cf34b473fd04eb43f3d26bb5fd256238e5834ab9748f
font_03_sfnt_off00015e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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