Malicious PDF — malware analysis report

Static analysis result for SHA-256 1507636cd7caa948…

MALICIOUS

PDF

166.9 KB Created: 2021-06-08 21:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6fb020531124f8b9e6fd2edcb7691d55 SHA-1: a69c7b263abeef8f56ff6df4948f3d0e44797cb4 SHA-256: 1507636cd7caa948c1cc5a53080c4cb8cf4a03f245319cc95bb1d449a9882612
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. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content or download further payloads.

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://archism.ru/uplcv?utm_term=sao+s3+episodes PDF link annotation
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075b1b01386c---49474066748.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a118703afab---bajurote.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787e85666d3---bunorikamuxakoworabidarat.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/nupudebexanefidabalut.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/77580d8fae741e46c884ee119df9fb21/mojufirutimufegutisuzij.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/5f152121d5dc7dfe56dc261ca1cb9bfa/86797003603.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084054b830ad---62618943554.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0242b71ec---49183716595.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/80938953190.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db5c86d030---sokexuledobaxiliga.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/wimekevupaz.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16095c8c03996c---zumudasimefi.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/56193216768.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/5vtok65glgb8u7pfv8prkdjqd3/16427337266.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160983620c566b---gubow.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/16149869299.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb197cba47---fivezobawujume.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ccf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CCF4 44792 bytes
SHA-256: f11af38ecfddaae45b114f924ca0098894ec1119f42b82ebd3c53f480f97bb42
font_01_sfnt_off000255f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x255F3 5092 bytes
SHA-256: 72d5cc45a21d8d3f6cead0bd939d09c42aa86fcaf8794ec8585ee3bd5cda40f9
font_02_sfnt_off00026754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26754 11684 bytes
SHA-256: 03eb9371c9fe2032439c2be2237568c4cfefe1b8c7e1c0c295bf337ae9407fe5

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