Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6caad3f4fea9dc1…

MALICIOUS

PDF

84.4 KB Created: 2021-03-02 16:13:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0049b998d213854aa4631dac8b9b33de SHA-1: e2f3531c73c956489270512aa600e4d7ea6762df SHA-256: f6caad3f4fea9dc10e7773384a42cda8de0440bd3e19d81d17fcdb4e7f709607
184 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links, with at least one identified as a redirector to known malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to direct users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=the+crown+season+3+episode+5+lord+mountbatten In PDF document text
    • http://lumogodasekepi.mypressonline.com/best_advanced_spanish_grammar_books.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/98239251549.pdfIn PDF document text
    • http://4gusevshop.space/landlords_tenancy_agreement_template_freee2ls8.pdfIn PDF document text
    • http://agent-spv.space/bewirobovebhiyq1.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/average_velocity_equation_calculus.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/what_motivated_european_exploration.pdfIn PDF document text
    • http://topstop.site/falodu70dsa.pdfIn PDF document text
    • http://verification-help.business/karcher_gas_pressure_washer_problems_pulsing3y5e6.pdfIn PDF document text
    • http://xtreme-sport.ru/l_etranger_albert_camus_francais7x1qv.pdfIn PDF document text
    • http://byseles.xyz/les_miserables_banglaw760p.pdfIn PDF document text
    • http://trydouche.xyz/resozogenalazugabexomcuqpa.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/what_is_the_best_book_on_servant_leadership.pdfIn PDF document text
    • http://tertov.xyz/8757353202yrr8.pdfIn PDF document text
    • http://termometr-medikal.site/uppababy_vista_v2_2020_pram_review1tfpr.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://titugol.atwebpages.com/what_does_f1_mean_on_kenmore_oasis_washer.pdfIn PDF document text
    • http://kepawomokatuke.myartsonline.com/15670203165.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/gixupotoworawozoditawemo.pdfIn PDF document text
    • http://sitafefisoju.atwebpages.com/members_mark_grill_instruction_manual.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/jiretulilik.pdfIn PDF document text
    • http://zuputes.atwebpages.com/why_do_my_eyes_hurt_to_look_up.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9A 5664 bytes
SHA-256: 2ef90db42c34559bff696ca96a6211041bf8681cc7ea6a2158c543afbb5c8d96
font_01_sfnt_off000111b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B4 10524 bytes
SHA-256: a16278c5aeed8b88529fcca05bf14f4ade3b03949d1c2e54c1fee10849c8fd78
font_02_sfnt_off0001356a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1356A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378