Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b62ec487d674cf…

MALICIOUS

PDF

94.8 KB Created: 2021-09-04 09:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 806606f88485b66b44cb0617972c33c6 SHA-1: 1175653a1a6bd093dcb4d93cb2e9cf128ca3b870 SHA-256: e7b62ec487d674cf6c9ee4a5c11ad1c75662c1a03e1dfb36006c257f3032cf3d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various compromised or disposable hosting sites, likely to host further malicious content or phishing pages. The 'SE_CALLBACK_LURE' heuristic specifically points to a callback phishing or tech-support scam pretext, where the document likely prompts the user to call a phone number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://hyosungulf.com/uploads/file/muratamelipowi.pdf In PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/jhijo3d2imediko1r9ds1thbtv/13293625378.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/21993252395.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050708003586.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160fa33480dc03---vaninigapavofinenovalatu.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/a1df919aca6a605c6303793b45162ab0/3766062077.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/87770067752.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd093cbfa1d---garepujujumoripelumaxot.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/zabikezudiburokanupoj.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c88a1d493e3---letowofopuna.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/e98180ab32313c5dc1cb08e8c2278956/jajipo.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/sagutulosokutozo.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/9639370577.pdfIn PDF document text
    • https://digireg.cn/upload/48060665694.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/jarujawisotapikisuvat.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1611e15e04ed32---jirivevixew.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/47ec17de77470ef84c51aec8b119f264/xedozorilel.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/68872311886.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/punatuzuzo.pdfIn PDF document text
    • https://digireg.at/upload/50588601215.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/96784372088.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a413b237576---rotilavoradivezazamesigaj.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/ruxalirebewo.pdfIn PDF document text
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/98a8801d0b72b8d23090abbaefdf3d13/1641458484.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=study+iq+current+affairs+pdf+july+2019PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10169 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11980 11520 bytes
SHA-256: aedfef28afe1d1e8496252c06091f79283ddb0960cc2baf6f44a02e0fb65089c
font_02_sfnt_off000134c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C7 20760 bytes
SHA-256: d5ff97f7a45e85868a518a9e6e9d69b54acc53ea31742f46bdc2b5b75c18dc01

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