Malicious PDF — malware analysis report

Static analysis result for SHA-256 76480c01307419fe…

MALICIOUS

PDF

77.8 KB Created: 2021-05-28 16:36:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4953a073f4ed72ec2b0df7f1514c9ae6 SHA-1: 4bda7a50e267b1a0029ed2a2c52e0e19e80620c1 SHA-256: 76480c01307419fe126fb893c35c26c9236e787bb9a770fade4d4526dfa7cc94
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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 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://golowaki.ru/123?utm_term=from_utc_timestamp+hive+format PDF link annotation
    • https://fitadidexedas.weebly.com/uploads/1/3/5/9/135977916/1b98269c81786.pdfIn PDF document text
    • https://lexifomaxinu.weebly.com/uploads/1/3/4/5/134595187/71b79956cc.pdfIn PDF document text
    • https://jatasurow.weebly.com/uploads/1/3/4/3/134358583/dd5da36eab2062.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417808/normal_6041c661eb3bd.pdfIn PDF document text
    • https://gikapizuwixa.weebly.com/uploads/1/3/4/0/134097763/xexuxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367911/normal_5ff85a2d78ff3.pdfIn PDF document text
    • https://tebafazar.weebly.com/uploads/1/3/4/2/134265880/c4073b88f8b1a.pdfIn PDF document text
    • https://mipijipibax.weebly.com/uploads/1/3/4/8/134873473/85f5bd950653.pdfIn PDF document text
    • https://lonewarole.weebly.com/uploads/1/3/4/5/134593790/nabusawodezuzuraze.pdfIn PDF document text
    • https://xurigatunirefor.weebly.com/uploads/1/3/4/6/134635133/jetomodenatasetama.pdfIn PDF document text
    • https://juwarojolajekol.weebly.com/uploads/1/3/4/1/134108785/mudoliwakafuwak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8404a0e-95c2-4469-871b-2a34ca144798/how_to_change_language_on_baofeng_uv-5r.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dae8071-3113-4af7-938f-e099906a7bae/15958151666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2d8c190-2aa5-4d21-880d-589ac02e93e4/88965865409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f09b28eb-7fb7-4290-ae48-dd3d4a6e5009/64839329676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/507e3c85-7c1b-4343-bd28-7b622c3a2530/negatitepiwerawepoke.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_off0000f3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AB 5268 bytes
SHA-256: 593cb1df0ca41db44f48e1f722d6d2dbeca31d25406bf03ab69ed2f570b6cdae
font_01_sfnt_off00010588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10588 10792 bytes
SHA-256: 2387a4e4cd027ad6594128b711743c098be0dd0f9056627583719628348df67e

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