Malicious PDF — malware analysis report

Static analysis result for SHA-256 a70e87ec5a66f8a0…

MALICIOUS

PDF

95.6 KB Created: 2021-06-02 14:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 43081b2401b14f3ff12b182f1f06cda4 SHA-1: 754eb28572bcbe18eecbf3f266fe704853dec3af SHA-256: a70e87ec5a66f8a02959bfdea2cc2c9c3cff7ae3a63abb9acdbb3906348404e8
126 Risk Score

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 0.9952

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://pixomot.ru/pbw?utm_term=what+does+the+ebony+clock+symbolize+in+the+masque+of+the+red+death+brainly PDF link annotation
    • https://zematuwarun.weebly.com/uploads/1/3/4/3/134327873/6657399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_601bafe017d95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498893/normal_605c84c03ee9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413848/normal_603e07ebe1b64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412575/normal_5fdc572509bcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_6043e9d0281e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387410/normal_5fc75f9201a97.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4488315/normal_60afe7d2e85a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381971/normal_5ffdfd20b54fa.pdfIn PDF document text
    • https://zomuguwiremadak.weebly.com/uploads/1/3/1/4/131406071/zifev-wobasapomegata-ruxubulafum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386613/normal_600c870f2bd35.pdfIn PDF document text
    • https://nulokoset.weebly.com/uploads/1/3/4/4/134447361/ebdde7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_600a1369ba83b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gogoporiwo.pbworks.com/f/tokinidagusadifubunuxa.pdfIn PDF document text
    • http://pojaweku.pbworks.com/w/file/fetch/144462621/muleduredopazutipel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f8aff0-06f5-48d2-920a-d6304ff26e6b/what_are_the_odds_of_quantum_tunneling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ebf5587-0a86-41f1-b352-ac337c27caac/how_to_write_a_general_personal_statement.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/w/file/fetch/144464901/how_to_get_minecraft_windows_10_for_free_with_java_2021.pdfIn PDF document text
    • http://kiletejude.pbworks.com/w/file/fetch/144411600/the_ph_miracle.pdfIn PDF document text
    • http://bekivuxuga.pbworks.com/w/file/fetch/144413796/80242083762.pdfIn PDF document text
    • http://negaboxa.pbworks.com/f/16188700231.pdfIn PDF document text
    • http://sepaxebi.pbworks.com/f/fukifevilevigujunu.pdfIn PDF document text
    • http://kekirow.pbworks.com/f/maxefujoja.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/f/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8bd1b13-d72e-486c-948d-f1f51b018a1b/10092476115.pdfIn PDF document text
    • http://bekivuxuga.pbworks.com/f/mafuxo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D8 5756 bytes
SHA-256: 396709f161267f5142c39539da2ddbb5f65f9c0c1a4df15250049b627ddc7664
font_01_sfnt_off00012b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5F 11036 bytes
SHA-256: 9f772f89c558817bb14dab156ac258de58c88c9cc9a11d0aa72d5d673b21557f
font_02_sfnt_off00015105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15105 18044 bytes
SHA-256: 8c166bcba7f2bf643d6502428ca8e6d3976414cde74a8a93a74f6df940fd378b