Malicious PDF — malware analysis report

Static analysis result for SHA-256 f098bf94893c118a…

MALICIOUS

PDF

70.4 KB Created: 2020-11-18 23:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 62d47e3d807ed6689f9a3652f7ac0567 SHA-1: af5c03330e07d860a7a1baecb8d3422cde70b01d SHA-256: f098bf94893c118ad547792d14228ba2ce6261cf5dd5c97f007fa358e31c98ce
214 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. Additionally, the PDF_SEO_LINK_FARM heuristic suggests a large number of external links, many of which are likely malicious. The ML classifier and ClamAV detection further support the malicious nature of this file. No scripts were extracted, but the presence of malicious links is sufficient to infer a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=north+vancouver+roofing+contractors In PDF document text
    • https://tifunubuxeji.weebly.com/uploads/1/3/4/5/134523212/a3d5ec6e36ed21.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/0a09412e-754c-4a31-8b77-37a51ff3722a/sasuvedevoru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84218fe3-d6fc-4647-957e-6751828f76cc/krylon_crystal_clear.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/mass_effect_2_weapons_locations_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/weebly_unblocked_games_home.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac128e8f-61d1-4ec3-b926-d02c7d0f5522/tezutatajuwipegonozem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e735030f-a6af-416d-97fe-b087699c1228/pekus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8d298ae-bf2e-4b4e-b4db-81a333c535f3/library_genesis_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a0790e4-cc91-4f1f-9690-f22690edf874/game_of_thrones_1._sezon_5._bC3B6lC3BCm_altyazC4B1lC4B1_izle.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_off0000d2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F3 5140 bytes
SHA-256: 89d638d698cb308a1b0e8479ed1a8248d5b8a2dfd8f26ea3b64fef556f6928e8
font_01_sfnt_off0000e47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47E 11568 bytes
SHA-256: 8aa8dd89ca662bbcb5b89a54a6f87a68300112afb542e60c9857231dbe35afc0

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