Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc0e600fc1b8d34…

MALICIOUS

PDF

73.3 KB Created: 2021-01-21 15:11:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2414b9ff663cfb3ecb189eb49da6f833 SHA-1: 9c9045d178bf33847cf7952ae5084739f2e1f667 SHA-256: 0cc0e600fc1b8d34fce2f890495e45296f89e2748eb89f7a7d1db6f73ea531c7
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on disposable domains. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure. The ML classifier and ClamAV also flagged this file as malicious, suggesting it is part of a phishing or SEO spam campaign. No scripts were extracted, but the primary attack pattern involves directing users to potentially harmful content via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/123?utm_term=about+me+black+and+white+icon In PDF document text
    • https://site-1174888.mozfiles.com/files/1174888/tilotawojosepubad.pdfIn PDF document text
    • https://site-1224141.mozfiles.com/files/1224141/acceptance_letter_template_college.pdfIn PDF document text
    • https://site-1177895.mozfiles.com/files/1177895/93983989521.pdfIn PDF document text
    • https://gitikaru.weebly.com/uploads/1/3/4/9/134901111/dojuzepawet_gurunisek_xozalibowu.pdfIn PDF document text
    • https://takojozosuliwo.weebly.com/uploads/1/3/0/7/130739597/nawotutupojasu.pdfIn PDF document text
    • https://jukonejidar.weebly.com/uploads/1/3/4/8/134876273/2fe34dfd.pdfIn PDF document text
    • https://lufiwusogak.weebly.com/uploads/1/3/4/3/134319395/8897666.pdfIn PDF document text
    • https://site-1174531.mozfiles.com/files/1174531/ideal_beer_pong_table_height.pdfIn PDF document text
    • https://site-1168410.mozfiles.com/files/1168410/truck_driver_city_crush_unlimited_mod_apk_download.pdfIn PDF document text
    • https://site-1168300.mozfiles.com/files/1168300/award_slideshow_template_powerpoint.pdfIn PDF document text
    • https://sixebujexe.weebly.com/uploads/1/3/0/7/130740217/febugipopar.pdfIn PDF document text
    • https://faberumul.weebly.com/uploads/1/3/0/7/130739640/1c729df9bef7.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/2a7f0941c223.pdfIn PDF document text
    • https://site-1258937.mozfiles.com/files/1258937/55863163131.pdfIn PDF document text
    • https://supenavasude.weebly.com/uploads/1/3/5/3/135397397/guwerug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tofarogupa.rf.gd/voxorulasofugagofemo.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_off0000e378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE378 5188 bytes
SHA-256: 005bbbf9e97979a8f718b35be92ee28f3d5182641702243e1f3d85c4f81ad1ac
font_01_sfnt_off0000f507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF507 10320 bytes
SHA-256: 266a7d8088889c6988dd6123f0388356cfee257e1aa1ec5cd89791bbcad36cde

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