Malicious PDF — malware analysis report

Static analysis result for SHA-256 0002d6013ae6845b…

MALICIOUS

PDF

78.6 KB Created: 2021-03-16 07:29:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: cd5b808e5f26a52e3ee3cd134b487a82 SHA-1: 0639582db9a96ab115ccefafae7dcf302c55beac SHA-256: 0002d6013ae6845b899dbdd6d75312c1cc3a98e04580f0ad50958ccd1caea78a
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or SEO abuse. The primary function appears to be redirecting users to other potentially malicious or spam-related content hosted on various domains.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=career+development+models+pdf PDF link annotation
    • https://mibelovo.weebly.com/uploads/1/3/4/6/134608705/7601107.pdfIn PDF document text
    • https://nupuwumot.weebly.com/uploads/1/3/5/3/135305030/f2ab1b02.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/gjihe18/73056487217.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/kidde_smoke_alarm_keeps_beeping_with_new_batteries.pdfIn PDF document text
    • http://nijalatol.mypressonline.com/kixuzafetog.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/the_sparrow_book_ending.pdfIn PDF document text
    • http://wumiwuzigimo.mywebcommunity.org/pdf_file_size_reduction_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/YpifiaV/betigisizesakavigipopibo.pdfIn PDF document text
    • https://cdn.sqhk.co/zezinojox/dm6jhgd/gutimerowike.pdfIn PDF document text
    • https://cdn.sqhk.co/lomotutuwe/P7Wghjf/hillsong_calvary_covers_it_all.pdfIn PDF document text
    • https://lixubirenolona.weebly.com/uploads/1/3/4/6/134669397/nibasasanagejoj.pdfIn PDF document text
    • https://pixumoxijabana.weebly.com/uploads/1/3/4/7/134748481/romimufufalogolibi.pdfIn PDF document text
    • http://fozurev.22web.org/nunuwogabonufirijelarig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://14319df0-7947-4f0d-bbb3-eaa17d5eb23e.filesusr.com/ugd/c45f38_41d9870e9ad24cd38afad787f32b84d4.pdf?index=trueIn PDF document text
    • http://tiwufuwivuvuf.epizy.com/how_to_learn_transcendental_meditation.pdfIn PDF document text
    • https://6754c94d-8795-460a-880d-d127bb37d4d4.filesusr.com/ugd/2383dc_c6a0062b53c5413cad3f9ec673905514.pdf?index=trueIn PDF document text
    • https://9a1eab6f-da2d-4a41-99bb-18a59f11b130.filesusr.com/ugd/c2b690_5ac5ed127b694edbbc057c94eecf1db0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a1678f-aa02-44a6-8ef7-3a5f538d15b1/kirby_vacuum_repair_locations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e7016ac-3c20-4623-95d9-3df3b700c35c/tevesokuxovamutudagot.pdfIn PDF document text
    • http://bemerimaxafup.rf.gd/autocad_lt_2012_tutorial_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67ae0fec-54de-47ca-8c86-c346b631c3e0/maya_angelou_death_cause.pdfIn PDF document text
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_9f20b8a275484e59952201f79be70e10.pdf?index=trueIn 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_off0000f658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF658 5152 bytes
SHA-256: 80910eb7c27043ab76478090243d29fd61c3cdf9e312c362ec17a6e3e37f6a9d
font_01_sfnt_off000107cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CF 11136 bytes
SHA-256: 89d6249961b1c7a7be0d93c7107d99da1438e50eb753543b92c86940054bf9cb