Malicious PDF — malware analysis report

Static analysis result for SHA-256 2adafa677f4329f8…

MALICIOUS

PDF

143.4 KB Created: 2021-03-30 20:36:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b181f1b9948b171f7815b1a958a5312e SHA-1: a62e4e32923e568efba81bcb2307111fc19ed85f SHA-256: 2adafa677f4329f885519f7c24227caaac965eaab60b4d7f2bc39323c3f89af0
194 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier output strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a tactic of directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

Heuristics 7

  • 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 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://soxebez.ru/123?utm_term=best+ticket+wallet+app+for+android PDF link annotation
    • http://ru-dev.xyz/godaddy_managed_wordpress_hosting_coupon8p4bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_5fe65936ea1f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420013/normal_602c767e8cea7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465557/normal_6015c42a9aad9.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/egiigpS/rolling_stones_gimme_shelter_video.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460446/normal_5fcad7e9a74ad.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/gf6jegj/tropico_5_review_ign.pdfIn PDF document text
    • http://claire-irk.ru/78586140950oq7oc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381102/normal_60477c3b2a6ea.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://reduslim-officialsite.site/how_to_use_godrej_refrigerator7kh2q.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/Cjjiy3h/european_golden_boot_standings_2018-_19.pdfIn PDF document text
    • https://cdn.sqhk.co/jozazixefuf/iieHfZu/tunebixewusapodul.pdfIn PDF document text
    • http://prizinsta365.online/pentair_minimax_nt_heater_repair_kit5acuc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458389/normal_60315b972544e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_604395bfaba79.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/igSje8y/shooter_arrested_illinois.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464056/normal_600bec32f2c13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387938/normal_5fdb227edfe81.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://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_979e0d3466fb49ada6473ad14c3d7e37.pdf?index=trueIn PDF document text
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_6216ab2df81646558b732e17a1d0c1d2.pdf?index=trueIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_a199f5ae89954a0691f7674cedaf1a30.pdf?index=trueIn PDF document text
    • http://timadulikojig.rf.gd/low_poly_mask_free_template.pdfIn PDF document text
    • http://sojetabusat.rf.gd/5411533291.pdfIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_6b0eabdf51ae4154b2557676d15715db.pdf?index=trueIn PDF document text
    • http://tovivefi.rf.gd/36383646672.pdfIn PDF document text
    • http://tujugub.rf.gd/69778746458.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00020527.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x20527 18092 bytes
SHA-256: 8e4abab4bd670a2948ead50218973abd60d8e6ae755fc2dfa13599407a16db75
font_00_sfnt_off0001cd4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD4E 5144 bytes
SHA-256: e1382171083849eaf721ef43eff399fa84895ae71a391dabaeb0280a7d6266b1
font_01_sfnt_off0001dee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DEE9 11340 bytes
SHA-256: d7d3a3373802ea01454fc2b8895d2721e1e3e0f99215f0df138ed0f9cd86e1e0
font_03_sfnt_off000220ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x220EF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f