Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e355d764846aec…

MALICIOUS

PDF

75.1 KB Created: 2021-03-03 04:11:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9cda29739d540b7c6e8f99fc9fbcf68e SHA-1: 1d8fbab66bbc112715d8d716d933037a29aeb1cc SHA-256: 33e355d764846aecf03f0cd31805d25ea3b7c8bd831d38623da58f94b2bd6469
166 Risk Score

Malware Insights

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

The PDF contains multiple suspicious links, including an invisible link to 'ig-supportcenter.xyz', indicating a phishing or malware distribution attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggests the document is part of a larger network designed to obscure malicious activity. While no scripts were directly extracted, the presence of PDF-specific malicious indicators and the ClamAV detection strongly suggest a malicious intent, likely related to spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://fokemale.ru/award?keyword=calories+in+bob+evans+mashed+potatoes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385213/normal_5fdfd5f076677.pdfIn PDF document text
    • http://copyright-infringement.business/miweriwiwryyg9.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/v53hjgi/xozugudedorubozokezotepap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422136/normal_5feb27b4f044c.pdfIn PDF document text
    • https://cdn.sqhk.co/pelopuxi/dnyiiia/28498291450.pdfIn PDF document text
    • http://moscow-siberian-force.online/what_to_write_on_card_when_gifting_moneyjm90a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457305/normal_5fdf77a613e9e.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwopaperuv/KSgfJyw/wipedigefixewivedikoj.pdfIn PDF document text
    • http://ig-supportcenter.xyz/10904569730hvdsn.pdfIn PDF document text
    • http://springtea.space/dia_1_de_maio__feriado_mundialywzrm.pdfIn PDF document text
    • http://relejovavup.22web.org/6535929694.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/eqsjfhj/frozen_throne_tower_defense_maps_1_player.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/bgeIgdU/6729254932.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/wapabefizosumi/pujagujurafumoz.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/69859461420.pdfIn PDF document text
    • http://botusojulepeja.rf.gd/how_to_set_up_meeting_on_google_meet_on_iphone.pdfIn PDF document text
    • http://gijuvove.epizy.com/75498077375.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/what_is_the_cost_of_a_sub_zero_refrigerator.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/abrg_des_marchs_financiers_2018.pdfIn PDF document text
    • http://puredaw.rf.gd/autotune_vst_for_adobe_audition.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_off0000ea81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA81 5304 bytes
SHA-256: a2d73e4025d066816028ef9e14c388c79f5afa62368d2864eb0fccef4abd5266
font_01_sfnt_off0000fc5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5C 10008 bytes
SHA-256: a20875463c5d7e9ad2a3586d51f8d05fc3f40756f2b643d2b39090b44b002513

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