Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a28763d5a6e3c4…

MALICIOUS

PDF

71.0 KB Created: 2020-12-19 13:13:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 03dde55e1b9cdac6c6d328889eda31c7 SHA-1: eba326e80bf3a2215be5231b0c373e12277a7472 SHA-256: 51a28763d5a6e3c445b4c77b7f946de26c6ed8e70ab41987da322d2ab8ad0196
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/aws?utm_term=business+card+design+template+free PDF link annotation
    • https://wetejitaxazis.weebly.com/uploads/1/3/4/3/134306742/c2c9972c1541e.pdfIn PDF document text
    • https://kurenilomu.weebly.com/uploads/1/3/4/0/134042522/7834571.pdfIn PDF document text
    • https://rimususoku.weebly.com/uploads/1/3/4/5/134587725/fireripono-rizilemusefesel-jebib.pdfIn PDF document text
    • https://tilakajunobeka.weebly.com/uploads/1/3/0/7/130739719/8504046.pdfIn PDF document text
    • https://gimelasu.weebly.com/uploads/1/3/4/5/134513778/3923228.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/a1d82b.pdfIn PDF document text
    • https://vixagukire.weebly.com/uploads/1/3/4/3/134364056/dirazera.pdfIn PDF document text
    • https://saxotatabaf.weebly.com/uploads/1/3/4/3/134328870/7164918.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/bazarerin-surilugajexu-jusibut-jopaxig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc10b71bdb33045eec31c8e/t/5fc172cde6d49a06bbc92180/1606513358141/small_world_learning_center_woodbury.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/ladiwilena.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/abbyy_finereader_12_professional_keygen_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/62967502068.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2e3890a2757459befecad/t/5fcf0dfb57846c5b834dab98/1607405052075/poxep.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://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_off0000cb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9A 5296 bytes
SHA-256: af155626fdcaad14c2cf26b3ee1eec30177642409c848743ac0662f3000eb38d
font_01_sfnt_off0000dd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7E 10528 bytes
SHA-256: ad466b7f3a6e51b3690d8885cf6d1e5da695c265ab9f22913121cf8e35dd608f
font_02_sfnt_off00010148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10148 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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