Malicious PDF — malware analysis report

Static analysis result for SHA-256 42d8651af0eb1243…

MALICIOUS

PDF

69.8 KB Created: 2020-11-14 00:14:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c52b72cf79cd6df69365cef8682eb76f SHA-1: bc11b495f1d5995f8b3c4af8c691377ee5c09225 SHA-256: 42d8651af0eb1243a320dae26c1f3c71b35fd58e1b2f34da9a3428c99e562830
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. It contains a large number of embedded URLs, suggesting a link farm designed to redirect users to potentially harmful sites. The presence of a PDF_SEO_LINK_FARM heuristic further supports the conclusion that the document's primary purpose is to drive traffic to external resources, likely for malicious purposes such as phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://gettraff.ru/123?utm_term=healing+hands+physical+therapy+piscataway+nj In PDF document text
    • https://dajetulanew.weebly.com/uploads/1/3/4/3/134309067/2885239.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/8979937.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/nigimul/xifikitufogexefar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6044cffb-2f16-427e-929f-5c9482d1071b/fokarozilawovubarizok.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/cambios_psicosociales_en_el_adulto_mayor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c8c0cb-fd46-44e3-9778-154fced5e4a8/61460554649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a3e83de-d290-46d8-9746-f7b02e614204/37909729133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d14aa0cf-b91f-4baf-a6f1-e34cfddacc24/49435315725.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/zotusuxogepidusotafomosi.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/41845648323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1be396b3-712b-46a2-a04e-81646b5a60a0/lodiusd_teacher_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ad18e97-802e-49b7-aac4-b6e5658b5d3c/pasodekodewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a0d8f0a-3f08-41de-a6e9-1320d99d9830/rome_2_crash_on_startup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be864cd7-0724-432d-9839-210c34058811/bopenofejateligurelizoxem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7280aeca-cc7f-49ab-ac88-d4de48611c51/32309589507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff67396-14b8-4c68-ac76-730f0ea9e7a4/rorozabaxanuma.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_off0000d498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD498 5568 bytes
SHA-256: ea7b997545b20a532cf424d036e0c73977e9f4fcae868e36f252de2d2dd4eb8b
font_01_sfnt_off0000e799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE799 10060 bytes
SHA-256: 11942174474ffb6ea9dcd69eb5afd213785ac3374b65bfbbc0e46956267e262a

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