Malicious PDF — malware analysis report

Static analysis result for SHA-256 a55425e20ccda106…

MALICIOUS

PDF

82.9 KB Created: 2020-12-22 22:00:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0d10302bed7042bff4e82b7279775f0d SHA-1: 16dc84c4049299d0caa869d4fda296997b793cb2 SHA-256: a55425e20ccda106fc199b058154e290b3ee165bd753f128816a0eadc9d2be0e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a link farm with numerous external PDF links hosted on disposable domains, suggesting an attempt to distribute further malicious content or engage in SEO manipulation. The embedded URL and the document body, though heavily obfuscated, point towards a lure related to a 'car dealer job simulator mod apk'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffine.ru/wb?keyword=car%20dealer%20job%20simulator%20mod%20apk PDF link annotation
    • https://kefobisow.weebly.com/uploads/1/3/4/7/134733217/6716606.pdfIn PDF document text
    • https://selisibukexapa.weebly.com/uploads/1/3/4/3/134317440/20f3b872.pdfIn PDF document text
    • https://gitijekukojijot.weebly.com/uploads/1/3/4/6/134626905/funixa.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/7e7a39.pdfIn PDF document text
    • https://sapixokevabose.weebly.com/uploads/1/3/4/4/134498139/9268076.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385648/normal_5fe00c1ef22c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393763/normal_5fb03e9e7f42f.pdfIn PDF document text
    • https://badetujunomut.weebly.com/uploads/1/3/1/8/131857650/divuwo.pdfIn PDF document text
    • https://rajepejejema.weebly.com/uploads/1/3/4/8/134860913/7774762.pdfIn PDF document text
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/b875ff633fa.pdfIn PDF document text
    • https://lixumubol.weebly.com/uploads/1/3/1/3/131384516/daf312.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/269267.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/befarekogol/nike_volleyball_knee_pads_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e14a79af-a503-46ec-a66e-0402896bf914/7212152389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbf75f88-bb8b-4024-9412-884da81e1e6a/carmina_burana_score.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/57192990787.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000106fe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x106FE 30456 bytes
SHA-256: 8fd0cce41f755e26de60c56e5bec3d99c009ab0bf2f7a47d2cb1da0255d4818b
font_00_sfnt_off0000d1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C9 5288 bytes
SHA-256: bf78ec9d73ca7d20c629724fd20514af8e35d604a2e0c6bf1d9f0d0dcac00d35
font_01_sfnt_off0000e3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A7 10424 bytes
SHA-256: a50105fd523db80788a640fe08e1c63b43ceba0496a5e65236d22202fb6c2624

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