Malicious PDF — malware analysis report

Static analysis result for SHA-256 af702324befdbdb6…

MALICIOUS

PDF

82.5 KB Created: 2021-01-26 19:59:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f6cf75b8627f116127e8c4cfebc8c381 SHA-1: c269ca86fd79fd2d391587cf7a0b8da0d3ddb37c SHA-256: af702324befdbdb64ab5232506dc0e1869911cfb9583b8afe33b6278e2626afb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to various PDF files hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment used to redirect users to malicious content.

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://trafftec.ru/wb?keyword=space%20shuttle%20simulator%20hd%20apk%20download PDF link annotation
    • https://cdn.sqhk.co/mitugejaxel/sI8jdjb/zozodakujime.pdfIn PDF document text
    • http://reactivaperu-2020.com/led_controller_with_rf_remote_control_pairingty762.pdfIn PDF document text
    • https://cdn.sqhk.co/latusetime/dhi0gef/xamilurofurawepuw.pdfIn PDF document text
    • http://atomlinux.com/learn_html_coding_freeq3m8u.pdfIn PDF document text
    • http://lisolu.org/rebenidepavakepirohl.pdfIn PDF document text
    • https://cdn.sqhk.co/sinemajud/cgdijig/nugiponenagel.pdfIn PDF document text
    • http://storeplus.info/jaziwedalasjrnu.pdfIn PDF document text
    • http://drilltech.info/the_war_for_the_west_abyssal_armor9k1es.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471995/normal_5fd7e32118bd2.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/4GjilTi/download_snake_candy_io_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/3erOo0U/14064773096.pdfIn PDF document text
    • https://cdn.sqhk.co/xobanozizesa/fgfhefp/80600541020.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/shiIjiT/marco_vip_betting_tips.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483070/normal_5fe445964ea5c.pdfIn PDF document text
    • http://luxshop21.site/muvozowirurumoxopubusofanyxhu.pdfIn PDF document text
    • http://stroymarketmetal.ru/8458727935696rn7.pdfIn PDF document text
    • http://agent-ritual495.online/best_wifi_analyzer_windows_7s7g0m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5fe6e8a76bb1e.pdfIn PDF document text
    • https://cdn.sqhk.co/wikelere/gfjg0QI/36119995232.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
    • 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD852 5456 bytes
SHA-256: d5a1f81db1fed376c745bac08aa199f10958e2fa4474bc3ae1d45efa55ed9e5c
font_01_sfnt_off0000eaba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABA 10968 bytes
SHA-256: 15317e83ef5a91501593bcd66085dccc4351cb9b6a7dde6af63fe4d3774b6eea
font_02_sfnt_off00011078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11078 18692 bytes
SHA-256: 94242e0705f32e1a2b7f6236d6ccec4af200a837f900714f0e27bdb978ad8e2c
font_03_sfnt_off00012e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E15 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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