Malicious PDF — malware analysis report

Static analysis result for SHA-256 5475be4826b57bec…

MALICIOUS

PDF

76.6 KB Created: 2020-12-16 03:13:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 257138d1ee3d52750958bf9431a55fd9 SHA-1: 19cffd70255444f80739ed8b313963e9517e8802 SHA-256: 5475be4826b57bec04951f64d13923d20edcb55deff143fbbbdf0256410b21f6
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://trafficel.ru/123?utm_term=sparco+car+seat. No scripts were extracted, but the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful content.

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://trafficel.ru/123?utm_term=sparco+car+seat PDF link annotation
    • https://naketutetan.weebly.com/uploads/1/3/4/6/134660231/65ee0.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/3448931.pdfIn PDF document text
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/8597688.pdfIn PDF document text
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/dd12801ec1ccc.pdfIn PDF document text
    • https://zumofimuletoxol.weebly.com/uploads/1/3/4/0/134018509/9825534.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/16a73e.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/1727bb46-5e9b-4167-9e04-e631a527fa5b/moxiranede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3156ab8f-5ebc-411a-93a5-680bf6dd394d/kuta_software_infinite_geometry_similar_triangles_worksheet_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc790fbfc603311fbfb0c74/t/5fced2c6509e863c681edc8f/1607389915593/lurudal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89497124-ca4e-4b76-b72f-5183e3f4f78b/fedex_line_haul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a606e275-7b7d-4b17-92ad-44e03d33b389/tomodachi_life_personality_list.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe30cb145a8629dc7b3eb8/1606299852752/identity_property_of_addition_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e918d6-822a-456f-bc7f-02ca955772cd/pubirogug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03b6a8be-ff18-4425-9d51-0d859d7e3412/burning_wheel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78ea8da5-8fc5-451b-8540-aacb80f0631d/bireriranewupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/981da09e-98bd-4620-a0b9-7a88e825d94f/scientists_internet_webquest_answers.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_off0000f179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF179 4996 bytes
SHA-256: b25ab8102d505c90fb1193b5b8f3b94869f811da0d0213a340a3857cc995b660
font_01_sfnt_off00010285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10285 10372 bytes
SHA-256: 18cdc97da1ea7b6c914650f45483a0c04043b943e0c706dbb396d17d7a2359cf

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