Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7a936dd850d75f…

MALICIOUS

PDF

76.7 KB Created: 2021-02-20 00:22:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 696ce7d0fbcb4634a4a6aba82161ceae SHA-1: b022fb5a5be110d7e022bffffd8fad2f32e31d54 SHA-256: 1d7a936dd850d75f6cf00b149972d65f09ac2f57299ba95b198dbbfb75b40c2b
126 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/strik?utm_term=realtek+rtl8100c+audio+driver+download+for+windows+7 PDF link annotation
    • http://kino-vezde.ru/43675581547lxvg8.pdfIn PDF document text
    • https://cdn.sqhk.co/sawomunuj/iegjGjc/farm_job_near_melbourne.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450430/normal_6008ee9fedc61.pdfIn PDF document text
    • http://itwomen.space/tamil_songs_starmusiq_2019px8x0.pdfIn PDF document text
    • http://wide-mean.top/945615290743gsq.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/EQidhhU/61471643504.pdfIn PDF document text
    • http://testvvd.xyz/lagu_careless_whisper_videovzc2h.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/LcibBgh/riwumil.pdfIn PDF document text
    • http://walletelectrum.buzz/kajosebijabuz6o2py.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/hbigZ5M/hakuouki_season_2_episode_2_english_dub.pdfIn PDF document text
    • https://cdn.sqhk.co/rajosibakulu/aihgffz/96879816607.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/fifRhgR/can_you_learn_at_home.pdfIn PDF document text
    • https://cdn.sqhk.co/litigoruf/jg8dFYc/xafiberogakevexa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412159/normal_5ff10e6c2d87f.pdfIn PDF document text
    • https://cdn.sqhk.co/suwuwewazaka/ehgVN2B/69447516969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_6029528e10b77.pdfIn PDF document text
    • http://form-lnstagramcopyrightservice.com/mmg_precious_metalsahuv0.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://vuvugifew.rf.gd/steel_magnolias_film_script.pdfIn PDF document text
    • http://wedagavuvux.epizy.com/blog_examples_for_students.pdfIn PDF document text
    • http://fukijudetoj.epizy.com/72668364078.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_off0000e0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C8 5588 bytes
SHA-256: d3c0c940e72ecb4cd4135112fcd204d33bb5cc1734c6f5588df86a91347e2472
font_01_sfnt_off0000f3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F2 10192 bytes
SHA-256: 37c2f2d27ec6d610a44c64c911ad500e9e3d8b84824b0b0abe359f50c9aa92a0
font_02_sfnt_off000116d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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