Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7e280802f79259…

MALICIOUS

PDF

73.4 KB Created: 2021-06-22 18:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 481887ff70b4736360669af6cfeffcf3 SHA-1: aaf96ccf8b3467fb35497b41e6ac303e900c4d98 SHA-256: 2f7e280802f7925950ad6eb3c8ce3d992d79557fc062842081920bb98072eece
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bscsaoner.in/ckfinder/userfiles/files/97788867531.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/aq18hrakg41guifkblsh5heai1/mesumajasokirivadug.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/a4eb3805ff9bb0f0b8261f9f615162ee/rezemedelesuku.pdf
    • http://s8radziejowice-paszkow.pl/userfiles/file/xuwutekusuwarajova.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/729938b6cbfc331373e145727d85c147/virenudani.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/31915df59c98502a9bf8f7d9f96c2db5/fidotusorufojupo.pdf
    • https://arch.ua/ckfinder/userfiles/files/nofuvoxibimawonirus.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/7e4bbe5ba77939c6eb5a66c7e512f888/89499932742.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5adabb4b9---91152936640.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/209f6634e5856746932cb068c210a77a/11312416777.pdf
    • http://tevukasveza.lt/ckfinder/userfiles/files/xujigupobigi.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b84991ff6d---xubexamajur.pdf
    • http://strandedtattoo.net/file/34595539787.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098c0d34731f---45774967537.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=simple+maths+problems+with+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e075.bin
dd2ce397ede3439d03e9b92e879b4d0f8d6d0cbfd806e975b521bd325e53c7f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE075 5392 bytes
font_01_sfnt_off0000f2a0.bin
f966956dda816aac131860a149471e2ecaf65a870e12dc12c249e1bc6cf1347d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 11300 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.