Malicious PDF — malware analysis report

Static analysis result for SHA-256 606d96bcd1143bee…

MALICIOUS

PDF

75.3 KB Created: 2020-11-24 20:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 767f3c5a2e5e204609c23fe66e153f64 SHA-1: 1ecb660fc3e59265bafdc43b09e19a89f34d21db SHA-256: 606d96bcd1143bee5d79c083b673ef64045bde268462a7f864953a931d10cf93
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The presence of the URL 'https://traffking.ru/123?utm_term=the+hobbit+pdf+reddit' indicates a lure to attract users searching for specific content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=the+hobbit+pdf+reddit
    • https://xogofodaromaf.weebly.com/uploads/1/3/4/3/134387758/xifesagirolaxaw.pdf
    • https://didilajuti.weebly.com/uploads/1/3/4/5/134585724/xutuzule.pdf
    • https://cdn-cms.f-static.net/uploads/4389106/normal_5faebabc218a4.pdf
    • https://nirotobilimob.weebly.com/uploads/1/3/4/4/134484477/9114691a869.pdf
    • https://cdn-cms.f-static.net/uploads/4449421/normal_5fabe648c0b2f.pdf
    • https://rubirilubuz.weebly.com/uploads/1/3/4/2/134266621/2007b.pdf
    • https://fivugolukebil.weebly.com/uploads/1/3/4/9/134902908/vofuwekiba.pdf
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5fa41f8d1b6f9.pdf
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/pexivo.pdf
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/4618549.pdf
    • https://cdn-cms.f-static.net/uploads/4390641/normal_5fbc1a748c75f.pdf
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/c32038ea8aa.pdf
    • https://cdn-cms.f-static.net/uploads/4427538/normal_5fa32dd294d61.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/857e81b5-3c93-4dfd-b4c9-3e49915ce353/90042998560.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de26.bin
f5e734862654ebc50132bf1fc9d0f1eb6097105bf1b7cbc9bb503c5fda386cf1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE26 4480 bytes
font_01_sfnt_off0000ed6a.bin
e1233297b056e9cd75c927ee6ced55c8f70059e43f685489f2633a48f1b227a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xED6A 10952 bytes
font_02_sfnt_off0001125a.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1125A 4324 bytes