Malicious PDF — malware analysis report

Static analysis result for SHA-256 f31ddb1ab8ebf47b…

MALICIOUS

PDF

99.1 KB Created: 2020-12-27 07:22:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7ca7e3ebc5a485c5a6821a48fe0501bb SHA-1: cdf3b5b8ea8361f4d47f9eb6a463caf303a8e92c SHA-256: f31ddb1ab8ebf47b9439a7c774b47ba3a9d40061cf13b58a6f09408843761f92
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results. The primary malicious URL identified is 'https://traffnew.ru/strik?utm_term=sports+car+racing+games+y8', suggesting a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=sports+car+racing+games+y8 PDF link annotation
    • https://vagesazo.weebly.com/uploads/1/3/4/7/134747595/zolijiled.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5f98e856e24f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383577/normal_5fcf9932f0c6e.pdfIn PDF document text
    • https://sobexezawatu.weebly.com/uploads/1/3/4/9/134903145/594f8e7.pdfIn PDF document text
    • https://cdn.sqhk.co/fakupavod/VEQS2hc/bloons_tower_defence.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/hdGNhhi/splash_lagoon_hours_tomorrow.pdfIn PDF document text
    • https://widuboxizivibib.weebly.com/uploads/1/3/4/3/134315701/pebabafuv_guvaw.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/4cb5048d-320d-46f5-b11a-15511b1db5ec/fisalilidunadisiwuwuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae9427c0-8f79-4f5a-965b-b23d73a84190/vertical_and_horizontal_communication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20da3487-8d84-4227-b512-3a88ecb12fbb/superstar_football_unblocked_77.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39634f10-cdbe-43e3-9dcf-cbec433d8f9e/code_org_lesson_11_step_11_answers_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48cf6634-666f-4bb1-8f93-9e9622abc2a9/88374870607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c7aacd0-44af-4b57-afab-3df06936e2fa/96867085811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c3d9369-38af-4021-8bef-b1e8ec16a6f4/7151987712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f005050-47f7-484f-9309-ca74715d4a8f/fundamental_of_physics_10th_edition_solution_manual.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001471a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1471A 5620 bytes
SHA-256: 3fc44205c6c8a1b35745b558e48983f1aeca3a8c7ae098482e9cc32aca2c1023
font_01_sfnt_off00015a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A27 10952 bytes
SHA-256: 7486021ce59c8af9321ff297328c2359f2c9dadb858d82365bc7c79c8bfdc884

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