Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f8620db84a4e52…

MALICIOUS

PDF

84.5 KB Created: 2021-03-18 14:17:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 3a95415c6321880181709bb831c8d2ba SHA-1: 7918e0da9daaf8850674e81596fd74cdd3c0226c SHA-256: 26f8620db84a4e52721fa1be00edd6dcde86b8de388a07f840a5be1e5b367744
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting and link farms, indicating a likely attempt to redirect users to malicious sites. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM further supports this, identifying the PDF as a link farm designed for SEO manipulation, often used in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=horizontal+rows+muscles+worked PDF link annotation
    • https://cdn.sqhk.co/nugizape/hfIjdie/cypress_hill_hits_from_the_bong_original_song.pdfIn PDF document text
    • https://jewevugaxezi.weebly.com/uploads/1/3/5/9/135967143/e698378e0d85c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365584/normal_5ffd0c3a231bd.pdfIn PDF document text
    • https://rafifawu.weebly.com/uploads/1/3/4/0/134042442/dofapu.pdfIn PDF document text
    • http://rizaloripejo.iblogger.org/contexto_social_y_politico_de_la_dictadura_militar_argentina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_60426ef2a8b74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369522/normal_5feb78b94be9f.pdfIn PDF document text
    • https://cdn.sqhk.co/nibijegun/cKhcvjf/ghost_game_get_the_chow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488822/normal_604e174d57021.pdfIn PDF document text
    • https://cdn.sqhk.co/pudamunipum/vhjhfgd/saint_asonia_flawed_design_full_album.pdfIn PDF document text
    • https://levavepisemewo.weebly.com/uploads/1/3/5/3/135303450/xawujakifoxuremu.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/Vjc8QWB/kefilezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494160/normal_60380412ecce4.pdfIn PDF document text
    • http://wekidexon.iblogger.org/74738724208.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/Je5ieSi/damivixigigidawatizojaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443325/normal_60254b0b6a5f4.pdfIn PDF document text
    • https://jasugupaxawuz.weebly.com/uploads/1/3/0/7/130740610/2d10be7803.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486745/normal_60078b00dd5a1.pdfIn PDF document text
    • http://sikutamilom.iblogger.org/va_vehicle_bill_of_sale_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rezafenunuritem.epizy.com/43085672507.pdfIn PDF document text
    • http://jewojaregoluwat.epizy.com/android_emulator_for_windows_free.pdfIn PDF document text
    • http://boxulinizisa.epizy.com/libro_el_arte_de_la_seduccion_robert_greene.pdfIn PDF document text
    • http://derekom.rf.gd/the_hunger_games_mockingjay_part_1_300mb_download.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_off00010c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C10 5252 bytes
SHA-256: c889d723fbe59fd5f6e19427d6ab8179c06e3729498f95c1a9469e99a82ab3bf
font_01_sfnt_off00011de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE9 11076 bytes
SHA-256: c8935aea87a0cf17896c12036faf6f6776cf79b5a96d605510d33bb445d1294e

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