Malicious PDF — malware analysis report

Static analysis result for SHA-256 7030a179bbc1d7e7…

MALICIOUS

PDF

77.8 KB Created: 2021-02-28 09:42:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: bf19d876226bfd7eb1a3b3ccdf23fee4 SHA-1: 82ec3d54dec9ab8449160ab6fe590f4447280c4c SHA-256: 7030a179bbc1d7e705d544679f3ebba9619e435b91f870f88725af866141e82a
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'how to rap over a youtube beat', which is likely a pretext to drive users to malicious websites for phishing or malware download. The presence of external URIs and the link farm heuristic indicate a distribution or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/award?keyword=how+to+rap+over+a+youtube+beat PDF link annotation
    • http://gejesixave.scienceontheweb.net/31597911190.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501980/normal_5fc72993df809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489607/normal_6026ec50579f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454822/normal_602e2f10654db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479674/normal_5ffcf128d093b.pdfIn PDF document text
    • http://xidasetetobuge.scienceontheweb.net/why_is_my_lg_remote_control_not_working.pdfIn PDF document text
    • http://komarovskii.xyz/innova_3160_instructionsqp5un.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468554/normal_601f00b56dc33.pdfIn PDF document text
    • http://setofexperience.site/legogilapil67695.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/474549029.pdfIn PDF document text
    • http://autoport76.online/cisco_packet_tracer_old_version2hzng.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415292/normal_5fd3b555509d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493209/normal_6012f357cfd67.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/bb_tuba_finger_chart_5_valve.pdfIn PDF document text
    • http://akb54.ru/posiwidibuperisuxuxede4o1dg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366308/normal_5fc833d16e4dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470964/normal_5fe791fb38b77.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/midaguvimabof/wakenilifuzilitusifo.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/botekorudazi.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/gipapidejewapi.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/32501481099.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88C 4956 bytes
SHA-256: d0fd68e93c136de9e7ba80f5572e5887d4a516496f4a6bf3a93be3fd66a6eb5d
font_01_sfnt_off0000f985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF985 2108 bytes
SHA-256: cd1bbe60a2fe17752ac494ee57533a5b175eb54220e218f27e61068ad08b1124
font_02_sfnt_off00010354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10354 11148 bytes
SHA-256: 7adb0408cee12a9663cad76230dc9542828edea111fe8b3d03a9983744ea0368

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