Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8a867b9c08c915…

MALICIOUS

PDF

97.4 KB Created: 2021-06-13 01:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a8b524426a1f585ba46488633e02e7a9 SHA-1: 13ce7a65a606085ad39df406371fe8c3eaecde37 SHA-256: ba8a867b9c08c915bc3be4314520a3d98e3149c11494198ae9618aa5880d7f9f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body contains a deceptive title related to MP3 downloads, likely to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://medvor.ru/pbw?utm_term=hum+tere+bin+dj+remix+mp3+download PDF link annotation
    • https://gosupafitowiru.weebly.com/uploads/1/3/4/6/134673249/pijomuponewe.pdfIn PDF document text
    • https://zenanewexakidop.weebly.com/uploads/1/3/5/3/135310893/1042356.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450041/normal_5fe0d523792d2.pdfIn PDF document text
    • https://sovakevu.weebly.com/uploads/1/3/4/3/134341498/7023595.pdfIn PDF document text
    • https://vijativu.weebly.com/uploads/1/3/4/5/134597759/tovewevutujadod.pdfIn PDF document text
    • https://rojomitalo.weebly.com/uploads/1/3/4/4/134485393/fonokimenujoxaxapoto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463262/normal_6015bd79394ca.pdfIn PDF document text
    • https://winiwezunubesu.weebly.com/uploads/1/3/1/3/131379740/fixatalonimux.pdfIn PDF document text
    • https://sasepanubur.weebly.com/uploads/1/3/4/6/134600976/160564.pdfIn PDF document text
    • https://komakuzafoge.weebly.com/uploads/1/3/4/5/134576335/2816753.pdfIn PDF document text
    • https://tesuxoka.weebly.com/uploads/1/3/4/4/134473976/savanemurerik_xuzen.pdfIn PDF document text
    • https://vutitikanok.weebly.com/uploads/1/3/4/7/134774074/395970.pdfIn PDF document text
    • https://dodapoxole.weebly.com/uploads/1/3/1/3/131398067/taduniseruvu.pdfIn PDF document text
    • https://fixabewol.weebly.com/uploads/1/3/4/7/134711766/difiniw.pdfIn PDF document text
    • https://garokeresikiga.weebly.com/uploads/1/3/4/5/134584686/pezozojul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/af4d98e1-2023-4032-b9c8-7dd63a6e23e5/pajutejeviluforima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad4d453-ec57-4775-af34-f127f62f75b5/how_to_connect_bose_acoustimass_module.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd779d3f-c981-4ddc-8ade-fb0c70065e92/tosuvisajunawi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D2 3236 bytes
SHA-256: d85f2f5ff4dd112b07f1e6e3f2fbfee41d75d57e2ab543234e6e88d1a4ff5d75
font_01_sfnt_off0000ed5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5A 5428 bytes
SHA-256: a984b6b1c0323373ef7a6e7c0e97145a7ff80e31864c22a5dcc109ed8d32cac8
font_02_sfnt_off0000ffc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC4 2316 bytes
SHA-256: 5b91c186c0d2506cbb1932d417fe2e40edf424c68f696d43443a27f8f7fee313
font_03_sfnt_off000109aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AA 8776 bytes
SHA-256: 614958edec37295c19ca20658581a7baacd396706123034b89dcd3a5105f4fd0
font_04_sfnt_off000122b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B1 11800 bytes
SHA-256: e73bd0fef41caeac16f05310469acf36989f1f37fc2258f1bf197d43c661f554
font_05_sfnt_off00014b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B44 17608 bytes
SHA-256: 52c7c6c2b12d2ff8c712ade5e436f256537af66d0785e0409d4299ac0057f97f
font_06_sfnt_off000165b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165B7 4020 bytes
SHA-256: 03fa2be299eaf56bbd61ab8b3a14daf17d3192478614f48d2865d8a62d5634a6

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