Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d61489dc929c53…

MALICIOUS

PDF

72.1 KB Created: 2021-02-21 17:41:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f4d06a5249f7c551658bad49ae48d0f2 SHA-1: 13347e72dad16363a9d45a2973f679329c63e3c5 SHA-256: 46d61489dc929c530ff1b886943ef4d4fcef522465c2e11befada596bbb28fc9
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 PDF contains a large number of external links, suggesting it is part of a link farm designed to redirect users to potentially harmful websites. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=reading+like+a+historian+indian+removal+answers PDF link annotation
    • http://busforpay.online/best_bloodborne_build83jkr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453342/normal_5ff90312cbdc9.pdfIn PDF document text
    • https://boxotegiperofog.weebly.com/uploads/1/3/1/3/131398000/0698f5057.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446494/normal_60030c5030bb0.pdfIn PDF document text
    • http://samelike.site/pagekakunopukul8ejo.pdfIn PDF document text
    • https://gugozakeku.weebly.com/uploads/1/3/4/5/134588211/64517fc.pdfIn PDF document text
    • https://gidiwukos.weebly.com/uploads/1/3/1/3/131381706/wogibowupoma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419194/normal_5fe0cf281461c.pdfIn PDF document text
    • https://rodinesupogoj.weebly.com/uploads/1/3/1/3/131384539/34fc22edafa256.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448992/normal_5fefc18a0b4f3.pdfIn PDF document text
    • http://agnewjacobs.com/craft_legendary_wown7y4k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479691/normal_5fd636c06c27d.pdfIn PDF document text
    • https://nipifofopofeduv.weebly.com/uploads/1/3/4/3/134338269/muduzararopu-dowuja-lutofokugoneloz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418972/normal_5fceee3551ea1.pdfIn PDF document text
    • http://dihtyar.online/896620824344jn07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420431/normal_600620058959a.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/fasudikek/pezite.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_off0000dd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9F 5460 bytes
SHA-256: 1a6f37d502e3abfef1135bf430bf25f350f0a69eb9028cf4ed479c0f8907eb8e
font_01_sfnt_off0000f01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01F 10360 bytes
SHA-256: 1ef63495aafc26481c883477409dc3a1febb33a68a0d510459eab5f18b29a206

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