Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba080fc31a6daac6…

MALICIOUS

PDF

76.5 KB Created: 2021-03-17 19:35:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 39cbbc568955b1dc8f61301d9d8ee197 SHA-1: 5842ee01bcf23896ccbb0702ebb1f2f3f70e1af0 SHA-256: ba080fc31a6daac65ded0c42f4b3e02fa9b6bb7492c4af2d88da413682d6e598
186 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The presence of a 'utm_term' parameter in one of the URLs indicates potential tracking or campaign-specific targeting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=rick+and+morty+voices+comic+con PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446646/normal_5fe7681e34866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413374/normal_604b451ac0ab6.pdfIn PDF document text
    • https://nezuvaju.weebly.com/uploads/1/3/0/9/130969963/tagajumet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_600e39653e5e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_6014b09caf0f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408873/normal_5fffd3668cb07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473041/normal_603ae8c111569.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465267/normal_600e070a15710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444655/normal_604b13da79321.pdfIn PDF document text
    • https://danifiwap.weebly.com/uploads/1/3/4/5/134585556/bivebujemumuv-wolewolajo-baxezasabu-vukesazapuxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459929/normal_5fc99e1a8addd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379363/normal_604ca01d50a27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413846/normal_6010e14c995e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418167/normal_5ff3f017f2b4f.pdfIn PDF document text
    • https://zokelafeg.weebly.com/uploads/1/3/4/8/134889419/bifude_jupagadisakaga_pavuwazopawaruj_xivabagivene.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_819dbed55f07423e9b2c14060d31288d.pdf?index=trueIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_9846c1399e9649e9b091148efad99158.pdf?index=trueIn PDF document text
    • https://edcb5511-827b-40b0-97c1-3499c313f96b.filesusr.com/ugd/0779a3_70ade556f98c4b5caff17e307f238092.pdf?index=trueIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_d5199ef803bf40e6a3efd651b9956fd9.pdf?index=trueIn PDF document text
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_f1bba757250e4636b2550d1e2d763d36.pdf?index=trueIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_4d8515dab82d4e32b0f05c5a504fa481.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_off0000ed0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0B 5284 bytes
SHA-256: 5e2d154c50d480d8b42eddcf1c1eec3172e98be3daf36c84fe4655ac92f7262b
font_01_sfnt_off0000ff07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF07 10980 bytes
SHA-256: aebee660115b5029cd831fcc879947be106b1ed64a5e6144227823fd05ac89e6