Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f1ce8abbfc564b0…

MALICIOUS

PDF

80.7 KB Created: 2021-03-09 10:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a83b9105f9ff6788cb638c7e58b9ae86 SHA-1: 6dd8f4756c308d8b9358a2aa3ca99bdfece0b255 SHA-256: 3f1ce8abbfc564b0c725faa9d22e12437518b21c8898464e773d98414e9086d9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to host malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/wb?keyword=books%20of%20bible%20abbreviations%20two%20letter PDF link annotation
    • https://boxotegiperofog.weebly.com/uploads/1/3/1/3/131398000/95e771.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486221/normal_600093e21a782.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413454/normal_5fe469c0eb9c6.pdfIn PDF document text
    • https://takigufumugo.weebly.com/uploads/1/3/5/3/135345847/4700364.pdfIn PDF document text
    • http://tiwilofojifig.sportsontheweb.net/peer_gynt_morning_mood_sheet_music.pdfIn PDF document text
    • https://pagajunudew.weebly.com/uploads/1/3/5/9/135992687/sufixad_botuberezaxesa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449793/normal_6008102c4f8c6.pdfIn PDF document text
    • http://dutusejutax.22web.org/77844064220.pdfIn PDF document text
    • http://walolexokesufa.sportsontheweb.net/suwon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416919/normal_5fcb799e35edf.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/is_the_nook_tablet_worth_it.pdfIn PDF document text
    • http://lafilubepojev.scienceontheweb.net/29739173973.pdfIn PDF document text
    • https://masumekufopig.weebly.com/uploads/1/3/4/5/134577820/5424801.pdfIn PDF document text
    • https://nujokolove.weebly.com/uploads/1/3/0/8/130874035/5f7c51fb39.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/3970007396.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kimoviranonaf.onlinewebshop.net/43492473326.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/60350483878.pdfIn PDF document text
    • http://livirava.atwebpages.com/jesse_tree_ornaments_jesus_storybook_bible.pdfIn PDF document text
    • http://zatajuvezutulo.rf.gd/google_spreadsheet_sumif_between_dates.pdfIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_8461fbb2ee1f4a3c88c0115f865ffeba.pdf?index=trueIn PDF document text
    • http://xirexadugimog.atwebpages.com/garmin_920_user_manual.pdfIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_5a880401a78640cab3c179c2effc2a38.pdf?index=trueIn PDF document text
    • http://ritanuwo.epizy.com/91987062157.pdfIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_f2e0209a106648f298062ad6ce75ffb3.pdf?index=trueIn 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_off0000f7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F5 5164 bytes
SHA-256: acbc71852678d59e086fe4f51c413f62e2ecc1303a04bfe22a974ca1bb82ae62
font_01_sfnt_off000109b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B2 13512 bytes
SHA-256: 890ba951f7056010ba1d4c5acc2cc16ea955bd7296e0d8fe2985d4287865f3f4

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