Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce7f5219984166f…

MALICIOUS

PDF

78.4 KB Created: 2021-01-03 06:06:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a79f8f5fe954ccbc22fb2e0dcebb1ead SHA-1: ee1de7883e117404d51a6a6f44efc295afb221ed SHA-256: 9ce7f5219984166f154acba22b3051adbfa2c6f38dc3bc529b55d4a60d3cae5f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a malicious intent to redirect users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or SEO manipulation attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/aws?utm_term=google+sheets+countifs+does+not+contain PDF link annotation
    • https://cdn.sqhk.co/zesunotu/HjehfEB/cartoon_cat_meme_generator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401714/normal_5ff13cd3a480d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421615/normal_5fefa2ced958c.pdfIn PDF document text
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/5b18ddc71d89.pdfIn PDF document text
    • https://cdn.sqhk.co/kupibetefuko/XorHDnM/zombie_hunting_simulator_codes_roblox.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/XPgfEDZ/ravens_steelers_news.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417429/normal_5fc7972661a1c.pdfIn PDF document text
    • https://cdn.sqhk.co/samumosoxivi/gggi3jj/boxibapalogufemovulad.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/2b433d68-2089-47ea-ac11-f2af467febff/realidades_1_para_empezar_p-7_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94d82846-7e72-458c-8608-60a4510addfd/66897392093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3c9ea9e-2109-47f2-8418-426bb12f693f/bidawiwidajiwela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc034a3b-4400-4d6e-9803-423e236981de/69358278857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fdc41a2-62d0-4dcf-abf4-5c8adf85902a/gatafusevelufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cde8eda-8065-4816-a4b3-02849530bfaf/31518208970.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_off0000e82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82D 5100 bytes
SHA-256: bf2fa4266b81ada4759f2c6e93ca6562b705e2de2cb42053e27e49f695ac32db
font_01_sfnt_off0000f989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF989 10704 bytes
SHA-256: 6651606375f6cf9ff4accd4df68250b1a502d900678820acccf0d14277389075
font_02_sfnt_off00011e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E14 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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