Malicious PDF — malware analysis report

Static analysis result for SHA-256 276f5d9acbfcd1b5…

MALICIOUS

PDF

71.6 KB Created: 2020-12-15 22:16:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 08419b1ff4f06977479eb8a73248a464 SHA-1: dac38fbe7590de3c41f821c7d2e2a0f8aef4d5e3 SHA-256: 276f5d9acbfcd1b507d36eb271d03ab64c02cccc03513cc5b86dbeb5262bef68
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with one prominent URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful content.

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 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.
  • 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://traffnew.ru/strik?utm_term=adams+funeral+home+dublin+ga PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f8d27e896c14.pdfIn PDF document text
    • https://ranenowubugipo.weebly.com/uploads/1/3/4/0/134040983/756483.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/1396723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5fc2c81e38aa6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445557/normal_5fc419d7d4f7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_5fa9ddbd4f94e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443804/normal_5fb3078d48b9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0cc92c6de34c7a3aea6f/1606225098563/jamozusini.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57e843398ff75154ce56f/t/5fc715661d106d256bbb1953/1606882664659/tabletop_simulator_sale_history.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe25a79d7936484057d845/1606297002460/buffalo_springfield_bluebird_live.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5de0c2bbd7406582891ec/t/5fc741426beae4543162bf73/1606893891479/22134434731.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd18d15e198d0a38642686/1606228178750/stephen_king_ur.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf57aff3de5e49b55b764c/1606375344156/house_on_mango_street_book_cover.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14db9116eb00e3c4eb5a0/t/5fca80c4cef45959076ca3fb/1607106757481/wagobovabunevis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4facdec917750a3f1d86e/t/5fcb12566e74d26c6ff8e415/1607144023926/how_to_decorate_a_cake_without_icing.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD100 5252 bytes
SHA-256: 43dd9949407c580e54d1f905f6cf65cf23352d39354d8a5499af4684d74ad193
font_01_sfnt_off0000e2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A0 9720 bytes
SHA-256: d2b20c9e983b17c5e22d0ad00d685e843623b467c6d128cab134cc16d7c5bc7c
font_02_sfnt_off000103c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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