Malicious PDF — malware analysis report

Static analysis result for SHA-256 db607009c62867e4…

MALICIOUS

PDF

76.3 KB Created: 2021-06-07 16:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2ce1af804c4ce8cd52de65bae8e90063 SHA-1: 096108aa547d177e2855cf6412665fe2f069ce04 SHA-256: db607009c62867e4fd855e48549939f3cda1546d45339e3a349ae2fdfc78d1e4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable hosting, a common tactic for link farms and phishing lures. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into visiting a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://smidgel.ru/pbw?utm_term=what+does+cuddle+bunny+mean PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402000/normal_5ff6b8eec50d7.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4387430/normal_60affeafd2c82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5fd2f5af15a9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452373/normal_5fceaa826b7ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465691/normal_5fde0604cb25e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_601dd372b1e31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413575/normal_60210c821e125.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386333/normal_5fc72f34ab603.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://venatulafiz.pbworks.com/w/file/fetch/144425259/12185922527.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/f/28667186608.pdfIn PDF document text
    • http://gopidam.pbworks.com/w/file/fetch/144592062/mezosorupanemulipibugazaf.pdfIn PDF document text
    • http://kedajawi.pbworks.com/w/file/fetch/144785838/jaborukem.pdfIn PDF document text
    • http://metudebebi.pbworks.com/w/file/fetch/144621468/beketadozidivususejimela.pdfIn PDF document text
    • http://xelivolofuso.pbworks.com/f/kepajoterunixovumurif.pdfIn PDF document text
    • http://sujagajo.pbworks.com/w/file/fetch/144556860/kesenowagituvuviluvo.pdfIn PDF document text
    • http://pojaweku.pbworks.com/w/file/fetch/144461922/kirkland_signature_natures_domain_puppy_feeding_chart.pdfIn PDF document text
    • http://godekazonigi.pbworks.com/w/file/fetch/144435447/nefanimebujete.pdfIn PDF document text
    • http://jutopar.pbworks.com/w/file/fetch/144627894/love_island_game_season_2_bobby_couple_trouble_answers.pdfIn PDF document text
    • http://malamojozag.pbworks.com/w/file/fetch/144665517/the_five_dysfunctions_of_a_team_full_book.pdfIn PDF document text
    • http://mulasamesi.pbworks.com/f/narrative_analysis_research_example.pdfIn PDF document text
    • http://rumusapage.pbworks.com/w/file/fetch/144646671/how_to_report_scams_to_the_police.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/f/nedira.pdfIn PDF document text
    • http://pefagisunel.pbworks.com/w/file/fetch/144768057/jagenopuwenaxutibeb.pdfIn PDF document text
    • http://giresizuloki.pbworks.com/f/how_to_pass_your_drivers_license_test_in_south_africa.pdfIn PDF document text
    • http://xibosini.pbworks.com/w/file/fetch/144763728/71525105671.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_off0000ec9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9F 5336 bytes
SHA-256: da83c4a5db85abd099a5e69b7d2993f4bf9b024ce6f8cfbcd06750c5d425d141
font_01_sfnt_off0000feb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB3 10928 bytes
SHA-256: 44f9509e94713f0cceeacab9af674d9adc58214452716085020e5e54dc90ba37