Malicious PDF — malware analysis report

Static analysis result for SHA-256 803071371aa3cb72…

MALICIOUS

PDF

82.9 KB Created: 2021-03-28 09:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3d5d697cbe112033a436eeaee36a9e19 SHA-1: d673de3d7101296e80f4ca083715a6446f8185a3 SHA-256: 803071371aa3cb72634c73048905a683680578cda58bd74171231bbd26f37849
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM and the ML_NYX_PDF_MALICIOUS classification strongly indicate malicious intent. The primary URL suggests a lure for cracked software, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/wix?keyword=avast+driver+updater+2.5+registration+key+crack PDF link annotation
    • http://otomail.business/narufafotakasofz800v.pdfIn PDF document text
    • http://lidzadva.xyz/corrugated_metal_roofing_sheets_16_ft30qm8.pdfIn PDF document text
    • https://cdn.sqhk.co/jipuxoxukul/Hiikon7/39678211717.pdfIn PDF document text
    • http://bitjoms.xyz/zusajijoduwagilolodipuq0wmc.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/hu2gcJW/your_personal_tour_guide_app.pdfIn PDF document text
    • http://badge-verification-center.com/83856723969p5l3j.pdfIn PDF document text
    • https://kajemawukik.weebly.com/uploads/1/3/4/5/134589491/956616.pdfIn PDF document text
    • https://nebofubegifeso.weebly.com/uploads/1/3/1/4/131437549/4470266.pdfIn PDF document text
    • http://formulamoney.top/f_table_0.005yvelk.pdfIn PDF document text
    • http://dreabling.online/cheese_plant_leaf_templatev52jk.pdfIn PDF document text
    • http://pixell.store/my_samsung_smart_tv_turns_on_but_no_pictureekkes.pdfIn PDF document text
    • https://jorojesa.weebly.com/uploads/1/3/4/8/134861508/milonivoba_tilip_rujesetatijin.pdfIn PDF document text
    • https://mipoxijal.weebly.com/uploads/1/3/4/7/134709746/6024749.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxarufodir/jcijjeo/e_news_fashion_reporters.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422147/normal_5ff0be25db81b.pdfIn PDF document text
    • https://dolevomebebozap.weebly.com/uploads/1/3/1/6/131636651/pufisabokokarip-bejat.pdfIn PDF document text
    • https://cdn.sqhk.co/bofotabi/yidggnI/foneganiwa.pdfIn PDF document text
    • http://energytik.net/63494067845yzk3t.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/bemedenuvabuxiv.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/793856855zyv2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444649/normal_60378c5560162.pdfIn PDF document text
    • https://fekujerixotose.weebly.com/uploads/1/3/4/8/134896765/luzet-pafonoboripenu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000102c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C9 5712 bytes
SHA-256: 1700b65b0d48516484e8bee38243b5fa9ca72edac9805af8830bf8b29a9bb1d7
font_01_sfnt_off00011667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11667 11004 bytes
SHA-256: d9af4c1847d57450d47dc66a4c948e66ac99aa61b575502d1feb711b73d14bbf

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