Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e26e22f041111a5…

MALICIOUS

PDF

66.4 KB Created: 2021-09-26 22:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7f9776534d50caf5f0eac0b39b8dd7fb SHA-1: 7c348d188c178130b89d26fd037280737f9d6359 SHA-256: 5e26e22f041111a547650c9ab5295ae255d5ce2a6c7a2c2210d091130c91b450
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Static analysis revealed it functions as a link farm, directing users to multiple domains, some of which are hosted on compromised CMS upload storage. The presence of numerous URLs, many with 'utm_term' parameters, suggests a phishing or scam campaign aimed at redirecting users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://drafthe.ru/uplcv?utm_term=porac+pampanga+zip+code PDF link annotation
    • https://pmsp-me.com/userfiles/files/43307094913.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/kurenikaw.pdfIn PDF document text
    • http://konakelektrik.com/userfiles/file/mavapabimasajexikiru.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/jiselonixu.pdfIn PDF document text
    • http://waypl.pl/upload/File/xuvogo.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/jixegotujopizowa.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/zebaganeperasoma.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/21991709133.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/worurafesodojagukat.pdfIn PDF document text
    • http://italy-ex.com/images/blog/file/42709718009.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d361e1d313---binivataxasora.pdfIn PDF document text
    • http://cissi.it/userfiles/files/75783083940.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/68242494919.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612edec8b4f04---japiwulorinidip.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/xaradivefopaw.pdfIn PDF document text
    • http://nmways.com/uploads/fckupload/file/gudinuzomivonetuze.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/getadawuj.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/42c6fafdf613fe2fea525ca7b26ea150/45749452674.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D5 10604 bytes
SHA-256: 34cc73e88fee4a99ff9a6cd0a6502ad9304e3f8f2ec4fdd67e23b750ee646881
font_01_sfnt_off0000bfd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000d7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EA 14724 bytes
SHA-256: 4fe116212d02f9f22c5a9784715b4e8d6f5f648ca10b3ca8ea4e1e76163e8b91

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