Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e9026755b4d8d1…

MALICIOUS

PDF

79.8 KB Created: 2021-03-15 02:17:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 98088e0c59542c53704f1e10c57ffa64 SHA-1: 7310954c3720e5fcb28f7b81495c079d95df4cdd SHA-256: 34e9026755b4d8d1652d7510e876a4b268924bb2155daedb5d5bb177998bfd85
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 0.9997

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://bologen.ru/strik?utm_term=can+am+spyder+repair+manual+pdf PDF link annotation
    • http://zuvels.xyz/define_apology_formaltf97i.pdfIn PDF document text
    • http://forkidsshop.online/wolf_of_wall_street_canadian_netflixm8vsk.pdfIn PDF document text
    • http://hempmap.ru/que_significa_el_desierto_en_la_bibliavtud8.pdfIn PDF document text
    • https://dojifidixiwaji.weebly.com/uploads/1/3/4/3/134372722/6519635.pdfIn PDF document text
    • http://nesobaka9.xyz/bahubali_full_movie_tamilyogi13lio.pdfIn PDF document text
    • http://metazexepajesen.22web.org/30704126936.pdfIn PDF document text
    • https://birirewenojitu.weebly.com/uploads/1/3/0/8/130813362/2879.pdfIn PDF document text
    • https://tirilume.weebly.com/uploads/1/3/4/8/134886795/9828323.pdfIn PDF document text
    • http://xosavetevo.22web.org/faxifitufapuvijoxebidoti.pdfIn PDF document text
    • https://vibajadulefunuk.weebly.com/uploads/1/3/0/8/130874079/7f6d9b98.pdfIn PDF document text
    • https://musonilemif.weebly.com/uploads/1/3/4/7/134752032/xonilapirejebokojodo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/zuvixogar.pdfIn PDF document text
    • http://tunadexemuvaru.epizy.com/84391664210.pdfIn PDF document text
    • http://puxetedategekex.epizy.com/2007_chevy_trailblazer_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/53075317884.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/37012741938.pdfIn PDF document text
    • http://woduzubede.epizy.com/14721490492.pdfIn PDF document text
    • https://78a3f932-2eca-4366-91b9-d52a2f3c5f58.filesusr.com/ugd/a586f9_c63389db3c2b4c888ac1de782f7f8feb.pdf?index=trueIn PDF document text
    • http://zalaxorenisev.epizy.com/glucocorticoid_osteoporosis_guidelines.pdfIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_0f3bf58ca89d4ba384c03507ddeb70ae.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_off0000fc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC13 5196 bytes
SHA-256: e2c959cb624cae19d9e36ca8ea02b97f1203f7bdf9ba39b8042093029ccdd451
font_01_sfnt_off00010dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAE 10584 bytes
SHA-256: f7b8d5c3ab2e9261d424448c598899bf06910189744fb3e705e54b5ac3252653

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