Malicious PDF — malware analysis report

Static analysis result for SHA-256 33702288faacd35c…

MALICIOUS

PDF

86.6 KB Created: 2021-03-07 20:04:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4a88fa8dc2095338abcaab924f0799d4 SHA-1: 5c8ea80be5581ec85678db0212288ae4e1cda939 SHA-256: 33702288faacd35cfa505d1142d6e6ca38f8ffb35bc80c8ae5ff90239c4502d8
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm or phishing operation. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the use of disposable hosting and redirectors, reinforcing the malicious nature of the linked 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
  • 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://druttle.ru/wix?keyword=titan+quest+trophy+guide PDF link annotation
    • http://giocodigital.space/12883901448i0zud.pdfIn PDF document text
    • http://car-den.ru/vajegoluxarelakunoxeiw0ae.pdfIn PDF document text
    • https://gumotamilo.weebly.com/uploads/1/3/5/3/135319527/ziles.pdfIn PDF document text
    • https://sadozilodefizon.weebly.com/uploads/1/3/4/6/134659806/kiwuzevunodez.pdfIn PDF document text
    • http://bonusiotsbera.online/informal_amendment_process_exampleswy9y7.pdfIn PDF document text
    • http://duwosolutanuz.mypressonline.com/49660641103.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/jjijcrq/sir_nick_carter_young.pdfIn PDF document text
    • http://nazhivy.net/kukezuzibitowulum90nkc.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/bobol_wifi_mikrotik_dengan_androidw4d9k.pdfIn PDF document text
    • http://dutov.org/somijitokusalofazexupodub35yjo.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/jbCgjvP/lebara_germany_mobile_data_not_working.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/faint_positive_line_on_blue_dye_pregnancy_test.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/igijiaO/first_home_buyers_program_in_ohio.pdfIn PDF document text
    • http://weinmvc.net/the_seven_deadly_sins_in_the_bible_kjvzl2gk.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/67589715638.pdfIn PDF document text
    • https://zosagejezigim.weebly.com/uploads/1/3/4/7/134709887/94556edc67a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000117b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B9 5364 bytes
SHA-256: 2f94c10032ae48891acef30e4a7fc17cae73b44a47efd2cb3f0fb700880eb53b
font_01_sfnt_off000129f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F4 10476 bytes
SHA-256: 4fd720375682dde3d5b8ffacd9e09092e4530d773d083ec6abcea9f7a42cd34a

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