Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf70c99c08461458…

MALICIOUS

PDF

69.7 KB Created: 2021-01-14 12:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8f2abc98eb111a412c06af9e57e46774 SHA-1: ceb408498b9cc1f64152d5e60314501e7ffe325c SHA-256: cf70c99c0846145821af1f117e6f6cf238ab6c89cc8ff2a8fe3d8ee4cfca3880
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, indicating a link farm or phishing attempt. The embedded URLs suggest a redirection to potentially malicious sites, possibly for downloading further payloads or conducting phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=flyff+billposter+guide+1on1 PDF link annotation
    • https://cdn.sqhk.co/mivufarowiwi/BXnftii/flight_boarding_pass.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468814/normal_5fdd3180cba3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427526/normal_5fd8b75ae2bea.pdfIn PDF document text
    • https://site-1250269.mozfiles.com/files/1250269/ameda_manual_breast_pump_how_to_use.pdfIn PDF document text
    • https://site-1180062.mozfiles.com/files/1180062/6086041607.pdfIn PDF document text
    • https://site-1175279.mozfiles.com/files/1175279/rurexipobo.pdfIn PDF document text
    • https://fapifejoj.weebly.com/uploads/1/3/4/2/134265577/2049486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446155/normal_5fdc355432c50.pdfIn PDF document text
    • https://rajevolid.weebly.com/uploads/1/3/0/8/130813967/bomerope-lotetiwatogele.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kotenu/63390813943.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/easy_video_maker_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/yahoo_mail_contact_information.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/9791970766.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 8

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_off0000d41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41E 5248 bytes
SHA-256: 109b5b8b554f3fc86783116337458e6a908c4d68afaceef2c108575b118e22aa
font_01_sfnt_off0000e615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE615 10664 bytes
SHA-256: 3e7b83451c8ef7bc835a27a1f6dc5c4b5b53cb8c2c44962acbe5625b23dd78f1

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