Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c286ac6f096246…

MALICIOUS

PDF

74.0 KB Created: 2020-12-27 21:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0abf4d8a816c6bc30885dfbcfb998c9d SHA-1: e1b10763d76a64960f65c048b32a325670fd98e2 SHA-256: 00c286ac6f09624646aafcd7944c464834f3692a81124a5f18ba40fd9f87307d
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external links, including one to a redirector URL that appears to be part of an SEO link farm. The document body, though partially corrupted, suggests a lure related to "Brother speed mc rivals", likely a pretext for phishing or malware distribution. The presence of embedded links and the overall structure indicate an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffe.ru/strik?utm_term=brother+speed+mc+rivals PDF link annotation
    • https://cdn.sqhk.co/daboxazile/SNEZ3D8/stickman_battle_mod_apk_2020.pdfIn PDF document text
    • https://xowogibudul.weebly.com/uploads/1/3/4/4/134446034/7d36a3.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/0506d211-1aa8-4073-8257-3d4468ae0957/lg_wm3770hwa_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/earth_science_chapter_3_review_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/vosukajowobovajofef.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/66039315208.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/carnatic_music_theory_books_in_kannada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29509fa8-6ac4-4fb5-b54f-e50ba2d51a52/gibopono.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/tipudulibafovakane.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/64796808881.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2dded94-5c0a-4979-a7b9-fedfa386dbbd/skechers_burst_shoes_online.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/16880885483.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_off0000e53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53E 5424 bytes
SHA-256: eda2c4024904a4565bbf371bdd8a05b4f28e20487e44367fceb6a64e30e4fd0b
font_01_sfnt_off0000f789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF789 10828 bytes
SHA-256: 8012aa0a4396483ec34843c755505a63ae78bf0d6cd6b8baf9b16335ec3ba1bf

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