Malicious PDF — malware analysis report

Static analysis result for SHA-256 346974c57809cd27…

MALICIOUS

PDF

67.1 KB Created: 2020-11-25 20:02:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: eb9ef81c5afa5fe8b96e3d47a62f3573 SHA-1: 16a6315c42e135bed5cd8d3928e97cbbcd3add0c SHA-256: 346974c57809cd27ed42359a097841cdc69c508fcc2251716c324350522c17da
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' indicates a credential phishing lure impersonating American Express, directing users to a redirector URL. The presence of multiple external links, including a link farm, suggests an attempt to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/rojovufeperer_dabemikor_repujexafiji_pezaduwizonusi.pdf.
  • 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=d%2526d+gems+price PDF link annotation
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/rojovufeperer_dabemikor_repujexafiji_pezaduwizonusi.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/1104066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471082/normal_5fbbbe80699d1.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://uploads.strikinglycdn.com/files/78ebbf2b-09cf-4342-842b-9704a61a8c94/94301685825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc76ce9a-8572-4436-87da-59c1b16e05ee/4440523357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6302df03-8d05-4951-8dbd-518d97bb2fb8/wajetunipesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcf7ce64-909a-4a47-a460-ac2c7c99c168/jorge_bucay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b0e947-0685-43ef-be07-b48a7ba2531f/dukilek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e596b086-b17a-4489-b6fc-0ff8c70bd182/dish_network_receiver_722_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2048efd6-7e8f-45ef-b619-bea28f31f7d3/gudirejavapozojo.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_off0000c37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC37E 3484 bytes
SHA-256: 865832ca46ee1aac596e2af09c34c3d6059d9ba0f9f4eea226865a594599e1c6
font_01_sfnt_off0000ceeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEB 10384 bytes
SHA-256: 8e04b5615efb9e4f37143e6113f028abb2ad49c3efd292c08175cafb80d51917
font_02_sfnt_off0000f286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF286 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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