Malicious PDF — malware analysis report

Static analysis result for SHA-256 3671d656c12049ef…

MALICIOUS

PDF

81.9 KB Created: 2021-02-27 00:46:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a0f5c2cede26c8887ffd255675a09cf5 SHA-1: 6cb76dc7a701c2fac422ef38ae7d9db2746df0fa SHA-256: 3671d656c12049eff7b06ab625534143c44c303310c60d4187f8c5dc07baab11
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=easy+piano+songs+to+play+with+one+hand PDF link annotation
    • https://doxuginuf.weebly.com/uploads/1/3/5/3/135346615/76053.pdfIn PDF document text
    • http://evatopshop.xyz/zig_ziglar_books_amazons9i6c.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/lisudezutegajeji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426953/normal_6033ef27da736.pdfIn PDF document text
    • http://health-top.ru/mopisokedufosizamomor5thz.pdfIn PDF document text
    • http://mifelosilezine.iblogger.org/20056329534.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/b9gWogi/92768538671.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/j7Ridhc/4506690627.pdfIn PDF document text
    • http://redit.fun/39012931414cguli.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/gR0vjBN/fogiverenifuvubuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386087/normal_6002b2f88b465.pdfIn PDF document text
    • https://rifodajawu.weebly.com/uploads/1/3/0/7/130739776/3025908.pdfIn PDF document text
    • https://sugovodeko.weebly.com/uploads/1/3/2/6/132681033/fajim.pdfIn PDF document text
    • http://insurancecarusa.com/diablosport_intune_i3_updatez1f2i.pdfIn PDF document text
    • http://shop50off.info/3518080656981bep.pdfIn PDF document text
    • https://cdn.sqhk.co/nudavede/jajlHid/53022420317.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/when_did_bc_and_ad_become_bce_and_ce.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://zunebodiz.epizy.com/bolshoi_ballet_performance_schedule.pdfIn PDF document text
    • http://detosiko.rf.gd/hangaroo_answers_star_trek_cast.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/how_to_repair_windows_10_corrupted_system_files.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_off0000f77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77E 5064 bytes
SHA-256: 369f74b87fb95f33af08b27331f4768d7a9db9f7f49c5af5e4befdc229aa31a1
font_01_sfnt_off000108c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C5 10240 bytes
SHA-256: a6d7a83b2df0d4c7231634944ba05325c8107480c3ea92ee43e7f290c041c27c
font_02_sfnt_off00012bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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