Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea05aad46589d032…

MALICIOUS

PDF

81.8 KB Created: 2021-04-28 13:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a265d9445e2193ef259a5bfe1b811141 SHA-1: 746c289b4722b7eb2b27bc9d7329b53f29bda1a7 SHA-256: ea05aad46589d032a830ef0f655313d5effac1405883d106db546aac2e7d9c6c
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm point towards a phishing or content-luring attack pattern, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://xezojetit.ru/strik?utm_term=lemon+blueberry+protein+muffins+tone+it+up PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4500429/normal_5ff8946f8f570.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369173/normal_6001088e78b2e.pdfIn PDF document text
    • https://dolijirobodukij.weebly.com/uploads/1/3/5/4/135400652/456dec85ad0125.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452594/normal_5fdf8efbc7d31.pdfIn PDF document text
    • https://jasujidavoja.weebly.com/uploads/1/3/4/7/134770870/5839151.pdfIn PDF document text
    • https://dibalinelig.weebly.com/uploads/1/3/1/3/131380687/300129.pdfIn PDF document text
    • https://komamezumef.weebly.com/uploads/1/3/1/3/131398541/6106283.pdfIn PDF document text
    • https://tebugusenaj.weebly.com/uploads/1/3/4/8/134870623/392f5f90.pdfIn PDF document text
    • https://belijexulifowa.weebly.com/uploads/1/3/0/7/130738738/jodogakusediwu_wanozusenosexel_zigeji.pdfIn PDF document text
    • https://tipirigemiwar.weebly.com/uploads/1/3/4/0/134016889/220376.pdfIn PDF document text
    • https://vijidosuxidisad.weebly.com/uploads/1/3/4/3/134326963/miwebif.pdfIn PDF document text
    • https://kigodobegolalib.weebly.com/uploads/1/3/1/4/131453325/3505f0a4c2c.pdfIn PDF document text
    • https://sozagigojo.weebly.com/uploads/1/3/1/4/131454883/pikuxawov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495251/normal_5fe60e1a76bdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456985/normal_6065fedebe923.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/jitokarobizejatulo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/cat_in_the_hat_cast_pbs.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/dunkin_donuts_french_vanilla_flavor_shot_nutrition.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/rowalomabekunipuzuvib.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/japan_guided_tours_by_locals.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/53311356942.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/bilebawuxowid.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/58522642141.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/90959323280.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/pijokasepux.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE99 5020 bytes
SHA-256: 723c3bda9903202b2d2e12f7c55dd133a11ee0066e5a20363ad9599ce4bfe066
font_01_sfnt_off00010fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA6 11784 bytes
SHA-256: c4e93c4f21755f54fc9706bfa0c6cd82acdc555c109ef4b151aa535077c57813

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