Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f30b8f56fb1034d…

MALICIOUS

PDF

83.2 KB Created: 2021-05-11 21:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d3240d6a788da247a2b0ba557c733e44 SHA-1: 55f5d926df1f63b1d7dbdc7aa839c038868855e5 SHA-256: 2f30b8f56fb1034d5f5d65ecfff752498005e5b4783cab8e200499a793ab14ab
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 0.9998

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://nipisod.ru/strik?utm_term=is+h2se+more+polar+than+h2o PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455180/normal_6066fb8600802.pdfIn PDF document text
    • http://vogudikomi.getenjoyment.net/xedivazalaminimuvuxid.pdfIn PDF document text
    • http://valuburikodajad.medianewsonline.com/parliamentary_procedure_for_dummies.pdfIn PDF document text
    • http://goodshopsales.xyz/how_to_use_pentair_intelliflo_variable_speed_pumpw5g6x.pdfIn PDF document text
    • http://begetus11ppz.xyz/what_is_an_emote_pyramid1wp20.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/nutuvamedajijom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409248/normal_60641619e4dfd.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/kotikolov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420602/normal_5ffb493d2c90b.pdfIn PDF document text
    • http://paloxebesigovo.iblogger.org/corrugated_steel_sheet_norwich.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/2cfcffd6-a6b1-439c-9de3-a02c675f4df6/can_you_fall_in_love_with_36_questions.pdfIn PDF document text
    • http://boluwugotesuni.rf.gd/barcos_que_vuelan_prueba.pdfIn PDF document text
    • http://jujewejono.epizy.com/71124529802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59f87d25-8a6b-43ca-b985-8a064ab7d4fb/how_long_is_carvel_ice_cream_good_for.pdfIn PDF document text
    • http://jatugeset.atwebpages.com/gofod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f292abb6-d7c6-4d51-90b4-19da730145cd/femadorelefexazilam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b82d155-e836-4635-8c30-7d71be0b813b/tigugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac4e5db7-35a4-4924-9703-e1223c08fab5/webasto_heater_service_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/719dc688-d80b-4631-823e-c1418d1f3d25/damerap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a2b69ab-19cf-4b8a-a6f8-61badd96e6f2/91641835195.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_off0001045a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045A 5128 bytes
SHA-256: d96dc0d144581c730e858db3be86baa0e64c518f1e5f26bceb557041fc63e0ac
font_01_sfnt_off0001159a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159A 12556 bytes
SHA-256: 87266388797caba008d4185b627ea44922188f902b7760771d552a0329add1fb

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