Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5607ffb5ab3dbf…

MALICIOUS

PDF

82.0 KB Created: 2021-02-25 20:42:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 84d7f62b26ff058a378b25fdb6dd4b6d SHA-1: 2245b35596f91d95d24e44955d6550e35a71e6bb SHA-256: 9a5607ffb5ab3dbf2c3c024f1b114ce8b7a87f55da98414f7a43a17c657731d3
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links disguised as a user manual, with many pointing to disposable domains and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=samsung+galaxy+note+10+plus+5g+user+manual PDF link annotation
    • https://laregupofonel.weebly.com/uploads/1/3/4/4/134464195/5531335.pdfIn PDF document text
    • http://wejnpowk.space/the_war_of_art_steven_pressfield_goodreads201kf.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/how_long_should_a_home_water_softener_last.pdfIn PDF document text
    • http://twenty-promo2020.ru/beverly_hills_ninja_movieqjs67.pdfIn PDF document text
    • http://yourbigdick.space/telehealth_by_simplepractice_for_macxsily.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/what_does_blood_in_toilet_bowl_look_like.pdfIn PDF document text
    • http://covid-19online.site/naruto_shippuden_ultimate_ninja_storm_revolution_characteryjiur.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/gihcjiv/tigibomuvuvap.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/SWybic8/29246870616.pdfIn PDF document text
    • https://nokogijesa.weebly.com/uploads/1/3/1/4/131452879/eb8c2.pdfIn PDF document text
    • http://bufo.online/fce_practice_tests_vkwih68.pdfIn PDF document text
    • https://kasuvimifimo.weebly.com/uploads/1/3/1/6/131637099/5318360.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/JghtJig/feruli.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/hbCjfhf/wupevetetikovo.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/arjgdgg/73913978299.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/doxodewelobexebek67qv.pdfIn PDF document text
    • http://in-arenas.com/80108995238rhdex.pdfIn PDF document text
    • https://sinipipa.weebly.com/uploads/1/3/0/8/130874509/nafinoroxujapum.pdfIn PDF document text
    • http://scoretdho.best/amazing_grace_piano_sheet_music_easys3m4t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/31863345837.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_off0000ee2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 3724 bytes
SHA-256: 0bc2187513754c209a1ff1b79f120b31e782b370bd3c40d674ca37d1cde5bce0
font_01_sfnt_off0000fb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6C 5732 bytes
SHA-256: 6bfa951f449e0c7df6937c5d0b11d6b50e8798fc4a7e91eb7a26e4a58925e45c
font_02_sfnt_off00010ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE7 13092 bytes
SHA-256: e292efabb2b9db328d11dc38f50f4ad4d72169ebb40f4db47d5c1334fec843d8

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