Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b6c3558cf4cb3f…

MALICIOUS

PDF

89.8 KB Created: 2020-12-27 13:10:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 61e7beaa9a281d04be9475c027c2d060 SHA-1: 7b17e534abf4541838bf56d13fab7048ea2d8012 SHA-256: 29b6c3558cf4cb3f9da73d1879147187c9ba03c76e7024fdedc50101892c9ac4
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to harmful content.

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
  • 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.
  • 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://traffine.ru/123?utm_term=management+speakers+in+india In PDF document text
    • https://sonefuvik.weebly.com/uploads/1/3/4/3/134325549/7f396d69764.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/dhija6o/jolirabogalufexe.pdfIn PDF document text
    • https://cdn.sqhk.co/bepasasa/lnidhi4/58986555376.pdfIn PDF document text
    • https://tenasedoba.weebly.com/uploads/1/3/4/3/134333827/munenagebigiwuviv.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/jedaxopopuko/android_studio_jdk_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ed2a0ce-0d86-4c57-abff-5c0408131dee/cameron_surgery_textbook_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/jeopardy_answers_tonight_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/39868749220.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/99603703059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2e9442d-474b-4ea4-be3e-36bea4799f68/69255547991.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/15260818172.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/86305954123.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/zufigupebixepofanoreki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5951254d-4a50-4ec8-9d38-90bf88b97855/89574777293.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/season_2_episode_13_my_hero_academia_dub.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_off00012014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12014 5316 bytes
SHA-256: 26d905ddb2cf7225fb23bc0f43166daa8624ec6c77369f2ea727abf37913b340
font_01_sfnt_off00013222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13222 11196 bytes
SHA-256: ae614570b0a7ee9f165b6fea25fb3c8300e0f8c4ca3a8528f4fa72f6ff723cab

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