Malicious PDF — malware analysis report

Static analysis result for SHA-256 c950e0342412c471…

MALICIOUS

PDF

90.3 KB Created: 2021-07-30 20:34:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 1d1de7150a42a9e8a2fd551b6ac7e294 SHA-1: 2e6fa350705c76949f1311ce2e8419cfb995587e SHA-256: c950e0342412c471253ef614dababa5552700e5884c2d5e002c175d7f767d4d2
156 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. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be hosted on compromised WordPress installations. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user engagement or direct traffic for potentially malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://catamma.ru/uplcv?utm_term=civ+6+guide+cultural+victory PDF link annotation
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16090aa453a29c---99225636379.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/qhtu43t9douimloe77qll1sp60/24064132543.pdfIn PDF document text
    • https://marosme.ro/hirek/file/3893662522.pdfIn PDF document text
    • http://ramenzoni.eu/userfiles/files/xozezolutipe.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/51d3720140646c2750f870389603100c/97667443701.pdfIn PDF document text
    • http://teraval.cz/res/file/kakutopo.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f040ae9feb---22847464874.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcbdbe79d6---60888971225.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/34638805892.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/9ff07d42fe0d69808fea908ea144ef42/tukiga.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c8403a2b1---60878454299.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/28ef564958d05fe2ebc13d8ab804a86f/mupibesizikekider.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a1016886c5f74a06535d6dd05fb74c5a/49635721472.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/31406964828.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/tedobugededavazuw.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/dodur.pdfIn PDF document text
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/gitiluxagujiwibopujobiguz.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/n732codfd9njsbisj9ciiopsq0/pixudemipirosoditev.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/8175652cf85e186eb37831ff84116981/pojixibonobexevewalezapid.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/rivaxejonejusefivavos.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/84986742534.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/21c3ba36e9430bb36aa0cfe8cfbfcbb0/sejuxubivenonerokakefav.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_off0000ff2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2D 10752 bytes
SHA-256: 7d4e16800b97ae052cb7959bb3365024f0b25b6831eec0345fa236aa63ab3370
font_01_sfnt_off000117e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E2 16756 bytes
SHA-256: 376130d07b8de6f8889413d8ca2fb5352efc2085cbd5f97e61310e96131d56ad
font_02_sfnt_off00014379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14379 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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