Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9bef79b8690ef8d…

MALICIOUS

PDF

119.8 KB Created: 2020-11-11 18:20:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 70e30f01ce77c252c53e79ebb8ea0239 SHA-1: 78185217b241d27dddf70f281f776b4a8bbf12d5 SHA-256: b9bef79b8690ef8da741297d3bb6be05c04be3ef384856d04c07e0b757b0f96b
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous embedded URLs, with at least one identified as a malicious redirector. The document's primary function appears to be directing users to potentially harmful external sites, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffine.ru/aws?utm_term=janatha+garage+movie+songs++doregama In PDF document text
    • https://salofapaj.weebly.com/uploads/1/3/4/3/134314320/webokaga-zixemoresu.pdfIn PDF document text
    • https://kulojimafad.weebly.com/uploads/1/3/4/5/134518235/lazuxaxerumofir.pdfIn PDF document text
    • https://wojemedirok.weebly.com/uploads/1/3/4/7/134724763/bewegisele-zifipakaj.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/xozokole.pdfIn PDF document text
    • https://xodunutejoxefis.weebly.com/uploads/1/3/4/4/134476009/mepizazesi.pdfIn PDF document text
    • https://sokexuwog.weebly.com/uploads/1/3/4/3/134351495/wesesarikijoji.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/16b3c4f6-2d0c-4d73-b966-1f1c07cda957/72173956232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/814576c5-b376-4343-b5ca-275f231fa191/distance_on_a_coordinate_plane_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/download_the_freeform_app.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/3940372913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c90101-f7c4-4a0d-bb71-df448442c22a/tcc_southeast_campus_gym.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_off00019ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BA2 5256 bytes
SHA-256: 7cb510ba491d48c67802c15e5fa0ac4e6d531f883ee996250a898147af315efc
font_01_sfnt_off0001ad5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD5F 10788 bytes
SHA-256: c5f4eb32ceeb126a977a7b5598996988cd57117bd462b08236a80b75449258e8

Open this report in the interactive analyzer, or submit your own file for analysis.