Malicious PDF — malware analysis report

Static analysis result for SHA-256 7205e2afd6defa42…

MALICIOUS

PDF

82.9 KB Created: 2021-04-03 21:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 259646817711bd579d6ae757c233a537 SHA-1: 0311bf49921efe69ef9e4d14598c8a0cd28cc5bd SHA-256: 7205e2afd6defa4233793ad2c86ce372888a3e6a90ad542a2f81b458a93537fc
214 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 as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=gartner+quadrant+business+intelligence+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415756/normal_6040694e9ce62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402737/normal_5fcddee378b79.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/LhiUKtV/46491573272.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388814/normal_5ffa860c46a40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_6037a6ae53aa1.pdfIn PDF document text
    • https://cdn.sqhk.co/buzulexoxuve/fuTtjf2/swepco_texarkana_tx_phone_number.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454968/normal_601dd1d7b1bb6.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
    • https://s3.amazonaws.com/xamibudasagas/bollywood_new_movies_sites.pdfIn PDF document text
    • https://c208ddc4-37ec-4cef-823d-79aeaa8cd68a.filesusr.com/ugd/d34c4d_50ac5c58f2754d019a7de5ae234e5b1f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/stihl_battery_blower_home_depot.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/rockler_dovetail_jig_vs_porter_cable.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/ajagz_quiz_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/34688358020.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/borderlands_2_limited_edition_strategy_guide.pdfIn PDF document text
    • https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_54f0d553203f48758ec397e8d545bc8e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gudukupir/88893067531.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/lalutepuwijuwifose.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_off0000f58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58D 5656 bytes
SHA-256: 3807c7325479da886ff3ba5da19a9cf3faabcf1abffdd86b74784857a54ef028
font_01_sfnt_off000108d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D4 11068 bytes
SHA-256: 745722fbbd6d11e2f503f52a19301b19621ce056fb6abe32e87b675db24aaa7c
font_02_sfnt_off00012e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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