Malicious PDF — malware analysis report

Static analysis result for SHA-256 f534733d6b5937ef…

MALICIOUS

PDF

81.1 KB Created: 2021-03-24 11:48:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9f4a8ef2ec6ff7b50e68d333e3f44c2d SHA-1: 05cdb82676e043238a5385bb9f259b67b43dc612 SHA-256: f534733d6b5937efb3c4ab36ffc00f26cc0db6f9c233b7bd85082ca5afa90126
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs and the heuristic findings strongly indicate that the primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=trucos+gta+4+xbox+360+the+ballad+of+gay+tony PDF link annotation
    • https://cdn.sqhk.co/xudadidi/hiieFwN/gangs_of_london_cast_cole.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/jizanejizafetibuz.pdfIn PDF document text
    • https://tazipapanora.weebly.com/uploads/1/3/0/7/130776418/senekunujuzuxo_fadixani_falawavila.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/andrew_clements_things_not_seen_series.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/eibNjDv/51439435702.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/kNhh5N0/conspiracy_of_silence_1991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5fd2cef119d34.pdfIn PDF document text
    • https://romevezijije.weebly.com/uploads/1/3/4/7/134756673/2495782.pdfIn PDF document text
    • http://dasiwujupuna.sportsontheweb.net/best_brand_guidelines_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420602/normal_603d8a94bd8a4.pdfIn PDF document text
    • https://cdn.sqhk.co/wujugojuse/ciagjh2/fulojiris.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421049/normal_60167de720e15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450240/normal_602e6527eeb01.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/32017461211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5fd64db39f4cf.pdfIn PDF document text
    • https://cdn.sqhk.co/fezifoxunif/muMibhf/dangerous_dave_2_online_game.pdfIn PDF document text
    • https://fiwarurebel.weebly.com/uploads/1/3/2/8/132814972/7828509.pdfIn PDF document text
    • https://lakerevuko.weebly.com/uploads/1/3/4/6/134654656/torarigodet_lutomijajunepi_vujerufogazod_tofemavef.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/QsMjcjO/64701003736.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/o4ihjhO/javascript_android_game_engine.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/3sugcjf/55996531623.pdfIn PDF document text
    • https://galomitazede.weebly.com/uploads/1/3/4/7/134748449/zefosujezukak.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/mefovu/best_books_by_friedrich_nietzsche.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/floral_embroidered_formal_dress.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/ave_maria_gregorian_chant_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/federal_circuit_docketing_statement_guidelines.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_off0000f88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88F 6092 bytes
SHA-256: 9f1c07ed063e3e4ecadae307e916b10c3dadee0402cce80f499ae8926cea1971
font_01_sfnt_off00010d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4C 12156 bytes
SHA-256: 32eb70afb9f3beb9455e160197ccb3fbe52159cc6a55997720ea9f1c39c1c05b