Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46974905f8072a1…

MALICIOUS

PDF

80.2 KB Created: 2021-03-17 17:10:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9572af9e1301c9fe1a572561b8eb8ea1 SHA-1: 60016b40ea7026ec919e2f42824942572403a88c SHA-256: c46974905f8072a1e29da8648ad34a51dcce77daa9e93bf4e09a476051330208
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Numerous external URLs are embedded within the PDF, suggesting a link farm or phishing lure. The document body is heavily obfuscated, but the presence of external links and the heuristic firings indicate an attempt to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/award?keyword=pdf+to+autocad+drawing+converter+online PDF link annotation
    • http://tevfikyuce.xyz/how_do_you_work_out_the_residual_value30am9.pdfIn PDF document text
    • http://wowitaly.pro/how_to_reduce_belly_fat_indian_dietk80e5.pdfIn PDF document text
    • http://tk-pobeda.site/34110851825dmcwd.pdfIn PDF document text
    • http://erogan-encolumbia.site/hp_laserjet_pro_m15w_user_guideoy1bw.pdfIn PDF document text
    • http://babblescoop.store/samosipodafupewusazoxisaxr0c.pdfIn PDF document text
    • http://masajsalonunuz.com/16196672357cv9iz.pdfIn PDF document text
    • http://mestikon.online/does_dunkin_donuts_still_have_munchkinsssaye.pdfIn PDF document text
    • http://zesegalos.scienceontheweb.net/51080324004.pdfIn PDF document text
    • http://filanion.online/landscape_photography_tutorial3jitu.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/48892410652.pdfIn PDF document text
    • http://dakajak.medianewsonline.com/advantages_of_public_private_partnership.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/the_squat_bible_download.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/new_yorker_magazine_cover_december_28_2020.pdfIn PDF document text
    • http://7gusevshop.website/kedenojegivoxijipopojetid56gjg.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://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_7a9acf6aa25c4595a32952becf2e545b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/63431175370.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/durigonifemo.pdfIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_77775bc083eb4a7197899855b5fb2780.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/elevator_mechanic_test_preparation_study_guide_questions.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_off0000f109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF109 5048 bytes
SHA-256: bb4054a88f28db34e3aeb9c9b8050b14f88e8cf70d1b46a2ee0dca4befe1d1ac
font_01_sfnt_off0001024f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024F 10232 bytes
SHA-256: ab41d57c21dab548993533370d32c4c50017dda22e4e52164e6da8d137ba9711
font_02_sfnt_off00012556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12556 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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