Malicious PDF — malware analysis report

Static analysis result for SHA-256 570bf0f5202ed4ec…

MALICIOUS

PDF

80.4 KB Created: 2021-02-22 17:19:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4bffe7f28adedad4433ec3f265e13c87 SHA-1: ddf29f1779dd58bea1a5dc7fd9676acbf593442e SHA-256: 570bf0f5202ed4ec56d12b09eea8c2c373301fcd0a5f9bc2f4bd8110ca294ec7
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains a large number of external URIs, many of which are hosted on disposable domains or link farms, suggesting a phishing or SEO manipulation attempt. The ClamAV detection further confirms its malicious nature, identifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://druttle.ru/strik?utm_term=sunbeam+bread+machine+model+5891+manual PDF link annotation
    • https://cdn.sqhk.co/tijinujul/jeLhbsx/schema_electrique_moteur_monophase_avec_condensateur.pdfIn PDF document text
    • http://kizisuruz.22web.org/56956241949.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/UjfGTLp/50911111895.pdfIn PDF document text
    • http://letgtma.bid/pijododoxulozovogeranaxisvird.pdfIn PDF document text
    • https://cdn.sqhk.co/gexopoku/cjfhcNj/44453129872.pdfIn PDF document text
    • https://cdn.sqhk.co/tenotitur/4Rogchd/all_creatures_great_and_small_vet_kalispell.pdfIn PDF document text
    • https://cdn.sqhk.co/zajagatetode/eidthil/i_wish_you_love.pdfIn PDF document text
    • http://tehnomaster.net/50923521702ugzvz.pdfIn PDF document text
    • https://xanilavobug.weebly.com/uploads/1/3/5/9/135959945/2714403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443337/normal_5fd68573001a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470703/normal_5fe8b438b5e35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370767/normal_60002e516ffc5.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/ifsLQOW/choices_stories_you_play_vip_mod_apk.pdfIn PDF document text
    • https://nalovitifa.weebly.com/uploads/1/3/4/6/134600698/8c25a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491673/normal_60057fae9cf3e.pdfIn PDF document text
    • https://watorixaziju.weebly.com/uploads/1/3/4/5/134586039/masuj.pdfIn PDF document text
    • https://niromovikusuzu.weebly.com/uploads/1/3/4/6/134651616/suzidajaxikixavogi.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://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_off0000f048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF048 5572 bytes
SHA-256: f001ad985012c6151e503d25c827a4aea3489ce00b12ea8902238de7e6765e8d
font_01_sfnt_off000102f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F5 10324 bytes
SHA-256: 9ff03c2746add12c426caa55ec5690438dccc9a15477f907d035e084b81d2461
font_02_sfnt_off000125e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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