Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f015c62a2a6a866…

MALICIOUS

PDF

77.5 KB Created: 2020-11-11 15:16:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 59feb32c1124060d0a3909462c392d65 SHA-1: e6a421c74cd713dc07f35902367ffc91ddf7bd22 SHA-256: 4f015c62a2a6a866dc39b7e4fa919fb8819cb1161c708fb6ea4ede1139f5d2d0
164 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier, and contains a large number of external links, suggesting a link farm for SEO manipulation. The presence of 'SE_DOWNLOAD_BUTTON' and the URL containing 'service manual pdf free' indicate a lure to trick users into downloading potentially malicious files. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/aws?utm_term=suzuki+king+quad+400+service+manual+pdf+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420907/normal_5fa993adb317f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379984/normal_5f99911959ebf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5f8e4939075d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367286/normal_5f87f8e69b7cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408188/normal_5fa536b629417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f8a10be370ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379219/normal_5f8c0acc42bd9.pdfIn PDF document text
    • https://raxipufed.weebly.com/uploads/1/3/4/4/134474150/soloponafidojufom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_5f8b974d6317d.pdfIn PDF document text
    • https://xoretesani.weebly.com/uploads/1/3/4/3/134315313/wageloso_nibumalit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383925/normal_5f904d08c35f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_5f9885c729363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388612/normal_5f94ad6b259ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383444/normal_5f9b28651f619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5f9f73c0bcc02.pdfIn PDF document text
    • https://gedobelega.weebly.com/uploads/1/3/4/3/134375191/813bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD198 5800 bytes
SHA-256: ab58449b81a28f6a3a6a0e01a7ecaf061f6664c4b4462d678b46dece18924fb0
font_01_sfnt_off0000e536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE536 3696 bytes
SHA-256: dc7f9cbc738da7966e8801466bbc2086cb2082da216b41fe687dad446c086f4f
font_02_sfnt_off0000f417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF417 10772 bytes
SHA-256: bcae668c5a578bd979421871cea478da458c9d6f360cd7e68abb95def05837b5
font_03_sfnt_off0001188e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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