Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d07f26fbe50706e…

MALICIOUS

PDF

66.7 KB Created: 2021-03-17 18:36:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9f9f33ac1afd0d73f16b06930036dfa7 SHA-1: dece48d3955dac06aa8490865f360dddb205912a SHA-256: 9d07f26fbe50706edda871157ee06361c01ec7c0bdadea0014dff715ad8d50e3
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of external URIs and a link farm points to an attempt to redirect users to malicious sites, likely for malware distribution or credential harvesting.

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://baarspo.ru/award?keyword=ansys+workbench+tutorial+release+14.+5+pdf PDF link annotation
    • https://roxilegetewus.weebly.com/uploads/1/3/4/7/134721251/wanafezamunolame.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/76786466245.pdfIn PDF document text
    • http://nunobuzipame.medianewsonline.com/77430551522.pdfIn PDF document text
    • https://mibofadap.weebly.com/uploads/1/3/1/6/131637701/lufiwiwegu-guxud-fakenave.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/4735500.pdfIn PDF document text
    • https://mibirewisurux.weebly.com/uploads/1/3/5/3/135313447/gujewudasamurita.pdfIn PDF document text
    • https://jitedamanun.weebly.com/uploads/1/3/4/6/134627504/boguvixesotisaw.pdfIn PDF document text
    • http://rozewevojalel.sportsontheweb.net/14558350073.pdfIn PDF document text
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/5906252.pdfIn PDF document text
    • https://dujezipiver.weebly.com/uploads/1/3/4/6/134610991/tofodasovumiwu.pdfIn PDF document text
    • https://bumokodujexub.weebly.com/uploads/1/3/4/5/134595190/149e7ed9.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/lukejelosenozifose.pdfIn PDF document text
    • https://dapobirot.weebly.com/uploads/1/3/4/8/134888013/xipekilufosela_nuwijilemo_juwovamugokani.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rafetomobu.rf.gd/defilegixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05701d9d-2c62-4c40-a65e-c8944bab54fe/sundance_spas_drain_hot_tub.pdfIn PDF document text
    • http://gozuketitara.onlinewebshop.net/51074677048.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/game_battle_realms_3_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de87a7f-e056-4016-b3f6-f5bc56b25e15/xiliweweperuremipase.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/77031608064.pdfIn PDF document text
    • http://dabemekos.epizy.com/partnership_agreement_template_free_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/bavodixebanos.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_off0000c52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC52E 5924 bytes
SHA-256: 4a3fb6bafaa9d7c2219b072678567f310bc77d68cfaeca393ffa45cca6b105dd
font_01_sfnt_off0000d985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD985 9956 bytes
SHA-256: 078b3f10c61ca0417e645e3e092db5814ad286dafa3ca60710c43be5b728e51c

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