Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e98fc93c102311…

MALICIOUS

PDF

66.3 KB Created: 2020-12-17 02:01:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f48fdeb2cd25a6ad29fec2d0b85bdc3d SHA-1: 94567ef4a6d4d22413a798d24ecb40adfa94d29e SHA-256: d3e98fc93c1023113b4cd10e0a4cc6a0294a09ac018635b9238bfd84f39f4e85
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with a primary focus on directing users to 'traffking.ru', suggesting a phishing or scam lure. The PDF structure and embedded links are consistent with techniques used to distribute malicious content or redirect users to compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://traffking.ru/aws?utm_term=cobra+walkie+talkie+android+app PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386363/normal_5f98c917886a2.pdfIn PDF document text
    • https://zevebijupaxize.weebly.com/uploads/1/3/4/7/134754497/2130283.pdfIn PDF document text
    • https://bijimuxe.weebly.com/uploads/1/3/4/8/134886115/zusevagupi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc114788ef7301f8b11b9bb/t/5fc3c3d33570fb44d175f84c/1606665174073/dopepesuzejibejakavaxaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a4650d-c58a-44ef-970c-0204cefe228b/63587700771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c412ddb2-6f66-4dbf-a469-9a546feb980e/betezejirikunisorepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c725984b-a74f-4b3a-85a2-fa2436c0a25c/adjunto_adnominal_e_adverbial_atividades.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c23f0aa3-6db9-445c-a799-cd73bdcdedb0/ma_mi_mu_me_mo_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e091b5a-76db-459b-aede-adc4d0521357/zebududunatozusag.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b1e1c89e1c4b8fc407cc/t/5fc6c962a3696915e2100b8b/1606863202758/liderolibisarafot.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_off0000c77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77F 4976 bytes
SHA-256: 7853f1cfb797b35a1e4970776f6ae44ed257e93309682ad0f8a1aa04ae7c6ac7
font_01_sfnt_off0000d87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87D 10648 bytes
SHA-256: 546cdc5c3908207f00f9b261adfefdc74ed13ba3af0c9b0bbb793f8afb0b43ab

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