Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c09329ffa272370…

MALICIOUS

PDF

94.5 KB Created: 2021-03-09 04:38:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: c58cbcb2e2bae9e3c3df70896af87490 SHA-1: 4bd07bb35533d89d15515dbef4a8b1068c6d25af SHA-256: 0c09329ffa2723705e7c2c488a5909bfdbdf284105f1b29572b0e0845c04596e
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious phishing content. Heuristics indicate it's a link farm on disposable hosting, with one URL pointing to a keyword-based redirection. The 'SE_MFA_LURE' heuristic strongly suggests the document's purpose is to harvest credentials or session tokens by mimicking MFA or one-time code prompts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://xajibur.ru/wix?keyword=dark+knight+gear+guide+bdo PDF link annotation
    • http://mezoterilijixa.22web.org/85720812434.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/6828354.pdfIn PDF document text
    • https://nukimaxirob.weebly.com/uploads/1/3/0/7/130776041/28d112acaaa.pdfIn PDF document text
    • http://bokifov.iblogger.org/20706046056.pdfIn PDF document text
    • http://mijakaku.iblogger.org/sepsis_and_septic_shock_guidelines.pdfIn PDF document text
    • http://vemazewikale.22web.org/microsoft_spider_solitaire_windows_10.pdfIn PDF document text
    • http://nebuxopav.mypressonline.com/what_is_step_4_in_aa.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/55195712396.pdfIn PDF document text
    • https://tifixexeruwa.weebly.com/uploads/1/3/2/6/132682204/05d4192.pdfIn PDF document text
    • http://ratebekanolaja.22web.org/75722176832.pdfIn PDF document text
    • https://sadejakudabad.weebly.com/uploads/1/3/5/9/135965210/9503408.pdfIn PDF document text
    • https://jeludumekidi.weebly.com/uploads/1/3/2/7/132740852/jokixefakubox_kukanutaxup_finomobifev_nifem.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/mindhunter_john_douglas_book.pdfIn PDF document text
    • https://jasujoru.weebly.com/uploads/1/3/1/4/131483343/d2b38ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://minifuduredejo.rf.gd/how_a_scale_ruler_works.pdfIn PDF document text
    • http://memaded.epizy.com/jivemaduzexiziwi.pdfIn PDF document text
    • http://nemunuj.rf.gd/kimesomaxeduwesi.pdfIn PDF document text
    • http://zunuwovadete.epizy.com/anonytun_pro_apk_for_pc.pdfIn PDF document text
    • http://janarisugikev.rf.gd/economic_vocabulary_activity_chapter_2_answers.pdfIn PDF document text
    • http://minivenema.atwebpages.com/merozariwolage.pdfIn PDF document text
    • http://vekalaluno.epizy.com/flower_pattern_border_template.pdfIn PDF document text
    • http://wijinap.rf.gd/12171070839.pdfIn PDF document text
    • http://gajiwudozu.epizy.com/accenture_technology_vision_2018.pdfIn PDF document text
    • http://jawikaginixuxuz.rf.gd/nugawuraxozop.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_off00012d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D22 5080 bytes
SHA-256: e9a2bc6803f698b5babeac6ea0064c3245ef67a11286cc1b6b0eba61d677fda4
font_01_sfnt_off00013e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E5D 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000146ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146EA 11044 bytes
SHA-256: cc2e93ba71f9bddfcc5aff5e12105183036370cd6c4f06e9b78a8c40e9b07112

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