Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba804fe9e0c7ed5b…

MALICIOUS

PDF

83.8 KB Created: 2021-03-26 08:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3066aa6af80afef4cce6353b7b21c8fa SHA-1: ebd59febe1e34ddf9bdfc0f59dfd9df1e39105fb SHA-256: ba804fe9e0c7ed5b3c462d25958d57050a30ca4abb6ab7a034b500e270f75029
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or redirection scheme. The embedded content, though heavily obfuscated, appears to be related to a car review, likely a lure to disguise the malicious intent of directing users to potentially harmful URLs.

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://baarspo.ru/strik?utm_term=2012+toyota+highlander+limited+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413843/normal_5ff716ff9a82d.pdfIn PDF document text
    • https://tajujarosoko.weebly.com/uploads/1/3/4/7/134749081/48eb7f424.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470232/normal_603113622461a.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/zejizafujizusev.pdfIn PDF document text
    • https://lipemegovaw.weebly.com/uploads/1/3/4/7/134766771/gagaxulofora_razita_metizovebom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426957/normal_5fc878fe1dd64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386363/normal_60171198a1658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468837/normal_600a45d3af38b.pdfIn PDF document text
    • https://refedekejevejat.weebly.com/uploads/1/3/4/3/134312363/ba56cf750.pdfIn PDF document text
    • http://tunabamilusi.mypressonline.com/calculus_of_manifolds_spivak.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/vunizitixe.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/pijazezemapaxijije.pdfIn PDF document text
    • http://xunetokawetik.sportsontheweb.net/manual_ecocardiografia.pdfIn PDF document text
    • https://wumupokurura.weebly.com/uploads/1/3/0/7/130776197/fewapowuvijij_dusanuv.pdfIn PDF document text
    • https://gidepojijozi.weebly.com/uploads/1/3/4/2/134235950/34424c8fc74.pdfIn PDF document text
    • https://retagavit.weebly.com/uploads/1/3/4/3/134363188/buxesupin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zivonupawidam.atwebpages.com/sekijapunepadeno.pdfIn PDF document text
    • https://9480ebe7-8096-4165-94d5-b35dd525e9f4.filesusr.com/ugd/07b43d_b922350137c64c3a9f12d8c5807883c8.pdf?index=trueIn PDF document text
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_1fc902785bff49eb8f1f569cebbc0d9a.pdf?index=trueIn PDF document text
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_66f974ec8f6e428dba1d881e96777786.pdf?index=trueIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_591acbbd80c44f3586b44721cd124cd5.pdf?index=trueIn PDF document text
    • http://tipokeviti.atwebpages.com/agronomic_practices_in_maize_production.pdfIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/fabadazuvugetopid.pdfIn PDF document text
    • http://sanojepenot.onlinewebshop.net/cahills_vs_vespers_book_1_free_download.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_off0000fb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0F 5336 bytes
SHA-256: 00687b005a6e662374a364f253d2d0dca46945426a04dcd489ce69311fa53937
font_01_sfnt_off00010d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D03 11496 bytes
SHA-256: 3c6d124e55aa4ca614303710266bfde62c456e7de73bf55cb8d3e694f870122e
font_02_sfnt_off0001333d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1333D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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