Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d55e0afdd888a6…

MALICIOUS

PDF

67.7 KB Created: 2021-03-14 15:12:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7d7a46b6e196a3a8428044efa53f1bbe SHA-1: 39c9db126a2f01199a1a86374c174dc7e42727b9 SHA-256: 29d55e0afdd888a6079ef6f5cac3f6ee899cac13e32c69a2364a3549c4cdc841
134 Risk Score

Malware Insights

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

The PDF contains numerous URLs pointing to disposable domains, indicative of a link farm designed to host malicious content. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent. The presence of a 'download button' lure further supports the phishing or malware distribution attack pattern. Although no scripts were explicitly extracted, the PDF structure and URL patterns are commonly associated with malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/award?keyword=jolly+phonics+activity+book+1+pdf+free+download PDF link annotation
    • http://igonlinesupport.com/what_are_the_5_stages_of_piagets_cognitive_developmentw8593.pdfIn PDF document text
    • http://mandarins.space/craftsman_digital_multimeter_82141_fuseslg0ji.pdfIn PDF document text
    • http://clyb-wylcan3.space/14849314840s32jr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366982/normal_5fe40cc2ad78f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_60029561bb4fa.pdfIn PDF document text
    • http://desoneveru.iblogger.org/54319930522.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/gCgi0gf/22886511578.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393791/normal_5fdf0274c0bf8.pdfIn PDF document text
    • http://stankoff.org/lincoln_140_mig_welder_parts65adj.pdfIn PDF document text
    • http://suwetobolubujub.getenjoyment.net/acls_2020_espaol_gratis.pdfIn PDF document text
    • http://fafijitesulexiz.mygamesonline.org/how_to_use_a_washer_dryer_combo.pdfIn PDF document text
    • https://cdn.sqhk.co/zegegajugot/ogeqghL/vadomenexojowawut.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/enMuDie/billie_eilish_bad_guy_live_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470218/normal_603fc45116ded.pdfIn PDF document text
    • http://mybiol.site/sword_art_online_progressive_anime_wiki2rif9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bowibimedex.rf.gd/uspstf_cervical_screening_guidelines.pdfIn PDF document text
    • http://saliguk.rf.gd/tesla_model_3_australia_price_2021.pdfIn PDF document text
    • http://kilarosine.atwebpages.com/fegaramubudowesunofajomed.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_off0000c99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99F 5740 bytes
SHA-256: c2a30e6d41cb6f8f07f91e822e9437127c78a691ffe23d8263054f0081d16c61
font_01_sfnt_off0000dd43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD43 10580 bytes
SHA-256: 8379e1ab5f3a7d5cbaa2ab64814697fae09e67bfdee5ca6dd6d092d36e832f8c

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