Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f133acfec667aea…

MALICIOUS

PDF

71.6 KB Created: 2020-11-18 13:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a8bfdd24fe90dc64fe1f908ea965e0f4 SHA-1: 1d0588bf82bc2c159d20f09605a00f9052a77bbe SHA-256: 2f133acfec667aea3548bbd1ca00da56da1407c2a5cf84fbff6eeb07815e4a0c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, identified as a potential link farm. The primary URL, 'https://traffset.ru/aws?utm_term=folded+fortune+teller+printable+template', suggests a lure to disguise the malicious intent. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or SEO manipulation.

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://traffset.ru/aws?utm_term=folded+fortune+teller+printable+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5f9dd9a01c9e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487902/normal_5faecb31ea611.pdfIn PDF document text
    • https://jegesasep.weebly.com/uploads/1/3/4/5/134502647/zidefenutimiwoxeso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384469/normal_5f96004e1b645.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383922/normal_5fb3d6346fe17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405440/normal_5faedce27ddae.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/e7aa0e31-2f18-47c3-ae10-1795bc90bfa7/babevoxesorujupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c80f1174-cb88-4109-bdb6-f0f848ad7721/vopigelesogovibimoxotuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ccd4619-74e3-4fc6-abc2-023f13ac2df7/gumegajutumovo.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/29th_anniversary_gifts_by_year.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/washington_post_newspaper_contact.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/050be733-1d27-4bb6-a812-3c6bfe90d5df/moduzurikejumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1454b267-6d47-4dbc-adb6-d32633896fbb/5952693816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1482b1cb-e0b4-49ac-bdb4-456b1c7f1e0a/40709310603.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_off0000dbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD8 5104 bytes
SHA-256: 8f52fdb9647c6557fc9eb6fef47d57b688c3d78c1ce5c61dc32e31ab27672406
font_01_sfnt_off0000ed1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1B 10616 bytes
SHA-256: 3538c0b62bd71cb5b3c4695ac19b84d1e2a4c0bf1cc5e6a3cbceefa9fc57380c

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