Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f984a955c387fab…

MALICIOUS

PDF

75.4 KB Created: 2021-04-13 15:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a8440f281db43124d8ffddcc15f5521f SHA-1: 5745c383a404366072d63798d3f9a59f98c01d10 SHA-256: 8f984a955c387fab96515a0e4a59b4e7eabb2e851e566ab202acd76bf23114de
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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://kuzutuzo.ru/strik?utm_term=the+road+to+el+dorado+miguel+tulio+and+chel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371247/normal_603ebc6476c82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499979/normal_5fd1b6ca44a3f.pdfIn PDF document text
    • http://save50it.info/kagidonoxowokvw6.pdfIn PDF document text
    • http://naturebiolog.fun/vigowakimt6mp.pdfIn PDF document text
    • http://xodawasolu.iblogger.org/98816091723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450256/normal_605552e93d2d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443624/normal_5fe23a868a1da.pdfIn PDF document text
    • http://zaxukifo.22web.org/posufejuzadabube.pdfIn PDF document text
    • http://lamovingcompany.com/66912111492spnph.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402963/normal_606cbd9864a8e.pdfIn PDF document text
    • http://kikotukujumosif.iblogger.org/didega.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac9efc26-4ecb-494f-9d25-1eb9be63daa1/presto_food_dehydrator_06309_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac0507d-5d61-45ec-913f-9c6fd848ef81/can_i_install_sketchup_pro_on_multiple_computers.pdfIn PDF document text
    • http://bebegowudid.rf.gd/frosty_the_snowman_characters_wiki.pdfIn PDF document text
    • http://zufisad.rf.gd/zasemikumigaguj.pdfIn PDF document text
    • http://leragirifodoz.rf.gd/rainbow_magic_series_book_1.pdfIn PDF document text
    • http://dibulokesimerog.rf.gd/13303094893.pdfIn PDF document text
    • http://filusexiwagip.epizy.com/history_of_islam_in_india.pdfIn PDF document text
    • http://fopupasefe.rf.gd/captiveaire_a2-_d._250-_g15_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c734406a-aa9a-46eb-b2d9-c64a63e44dab/usps_priority_mail_international_signature.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/powawujiluba.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/antibiotic_essentials_2017_15th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/sclc_treatment_guideline.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_off0000eaa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA7 5124 bytes
SHA-256: 596b1dcb97b56d7e91a43da1804a0f75d2b16d7bb6afebb7d230c3d717bac7b0
font_01_sfnt_off0000fbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE7 10756 bytes
SHA-256: 96e76c82d01b69bf869a972834c00511202bc8ffdbb614ddb36547ad20e91850

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