Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbbd2ce10c91da58…

MALICIOUS

PDF

106.4 KB Created: 2021-03-27 16:25:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 95ceb65f68acd30a71d218e1e4554fce SHA-1: ee387eca07fd759b21bdc0eccab6062a4c960f6d SHA-256: dbbd2ce10c91da58a1a7b55b328ff1bb611bca7b2db1f464bc80cca04fdcb514
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and an ML classifier as malicious, specifically as a phishing or trojan distribution. It contains a large number of external links, many of which point to disposable domains, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains references to search terms and application names, reinforcing the lure. The presence of external URIs and the overall structure strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://maypoin.ru/wix?keyword=chadwick+atomic+model+wikipedia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486772/normal_5fe6571897f36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423462/normal_5fd2420060ca7.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/6hdigjb/calligraphy_fonts_free_marathi.pdfIn PDF document text
    • https://tupinikuwexopej.weebly.com/uploads/1/3/1/0/131070806/rebisep.pdfIn PDF document text
    • https://gamuzajebi.weebly.com/uploads/1/3/4/4/134481120/6155714.pdfIn PDF document text
    • https://cdn.sqhk.co/lejesapazud/xHIgigh/jupujutakujinevewufegal.pdfIn PDF document text
    • https://nenomoxemobare.weebly.com/uploads/1/3/6/0/136010140/4644778.pdfIn PDF document text
    • https://cdn.sqhk.co/xomakonezema/n7Bibjc/art_masterpieces_a_liturgical_collection.pdfIn PDF document text
    • https://sifofazawovetix.weebly.com/uploads/1/3/0/7/130776166/8946716.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/dhGicgg/free_bubbles_svg_files_for_cricut_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/ehgQQjc/gimemebe.pdfIn PDF document text
    • https://cdn.sqhk.co/fovomesit/jdIzjje/split_joint_birthday_cake_ideas_for_adults.pdfIn PDF document text
    • https://xarojitoma.weebly.com/uploads/1/3/5/3/135305856/94b424f51.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/egdEPQX/dragon_champions_battlegrounds_teams.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://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_ca59cfed3e514bdabcb5335899cbb0bf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vebenok/gantt_chart_sample_template.pdfIn PDF document text
    • https://df1d5e35-4e67-4e57-ba41-6141a32c4ecb.filesusr.com/ugd/c54278_cf27c29707c54fcd88c951e6baa115ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zijivevip/badger_5_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/ave_maria_malayalam_song.pdfIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_a19db5426047442ba377069c935a04a6.pdf?index=trueIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_f2f16ec7fbab4d0fa545ffd2dbd2d728.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/google_drive_service_login.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_off00015a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A08 4900 bytes
SHA-256: c4f6b5457e12e267683c406669366bb0a7393171bd5fc7c0c8c69276ccb06ebb
font_01_sfnt_off00016acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ACB 10388 bytes
SHA-256: a6bcaae2073f72d584faef050fd509e3cca0c8dc1c1af771ebaf7fb143128015
font_02_sfnt_off00018e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E67 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3