Malicious PDF — malware analysis report

Static analysis result for SHA-256 248f96d7ecb3bc64…

MALICIOUS

PDF

80.3 KB Created: 2021-03-18 22:36:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4f366962c708a16430691b9395560a76 SHA-1: 584c168ad6f75406a025900f2616f8be3172f555 SHA-256: 248f96d7ecb3bc64b66dd98932cdff4d1c43cf510bf82acf71298ddf8d9cc474
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=auto+lotto+processor PDF link annotation
    • https://cdn.sqhk.co/joraxeneli/TLjg9o4/pabimiwubanunelixaludejar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496580/normal_602c1f65c5330.pdfIn PDF document text
    • https://vuderuxedus.weebly.com/uploads/1/3/4/6/134692959/1278518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456676/normal_6017abb600b8d.pdfIn PDF document text
    • https://xuwirebusupedun.weebly.com/uploads/1/3/4/3/134379604/vaxasixasekakepivi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492246/normal_6014ffcade010.pdfIn PDF document text
    • https://pofomagod.weebly.com/uploads/1/3/1/4/131483550/ginuwa.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/Qihiiii/savenavololusipuner.pdfIn PDF document text
    • https://mizavuzozubex.weebly.com/uploads/1/3/4/7/134730625/redazevirivakaje.pdfIn PDF document text
    • https://dawoxojukuput.weebly.com/uploads/1/3/4/8/134890950/nomupuluzezewugu.pdfIn PDF document text
    • http://moperala.iblogger.org/rain_dial_plus_on_phone.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/loneminovu/plantronics_backbeat_pro_3.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/9293438459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/724cb216-fa45-4aec-b89e-e382f58e8edb/99265416508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f5a82e2-fe21-4cc2-afdc-586e724b1b0e/53839503338.pdfIn PDF document text
    • http://woxeladigono.rf.gd/how_to_fix_a_outboard_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f21816a-32f2-4ba8-abde-b894f9ebe494/glacier_bay_shower_faucet_repair_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3574e63-c086-441a-b401-8445cd3d090f/93732776578.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD88 4704 bytes
SHA-256: c6efa2e6bcc4c43271ed8cef8bebc3b8905706bca99794e8b524e771db1221e1
font_01_sfnt_off00010d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9C 11268 bytes
SHA-256: a09a7bc2fccd43722c156d61f4a8044dc0dd760d8d43a99ea9a19d9bc910f16f

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