Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ee40a556856f5a…

MALICIOUS

PDF

65.6 KB Created: 2020-12-09 05:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 73b9455937a1430b9474ce0ca88edbd8 SHA-1: de608a5a224dbe2b292b350e2457a300c778a16c SHA-256: 82ee40a556856f5a6b3f102902f0f8cce930f75508a80f3c712574371619a0ff
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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://traffnew.ru/strik?utm_term=mitsubishi+mr+slim+remote+manual PDF link annotation
    • https://kukonite.weebly.com/uploads/1/3/4/6/134611202/6365518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f8705bcdbb88.pdfIn PDF document text
    • https://ditikoxariwifip.weebly.com/uploads/1/3/4/6/134636805/4750927.pdfIn PDF document text
    • https://pudibodug.weebly.com/uploads/1/3/4/4/134464821/nizisudajimoj-jixikibibeda-pigiwinip-labewumuw.pdfIn PDF document text
    • https://gavuzolarot.weebly.com/uploads/1/3/4/4/134458525/fatuwegu-majaledepa-nemejonovisej.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/zaluv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413719/normal_5fa1abfd85f3f.pdfIn PDF document text
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/4623750.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/e4c210a9-3a54-4e6d-88d9-b463b74b590d/81531681336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb70b4f6-fdf6-4d3f-8297-8cd9d40e1ce3/jilizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34a60e34-58e4-4b8e-a254-e88bfcc71338/sapisisam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b61011d-b855-4862-af27-44bf68ecd75a/64721908246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb79750-2b57-471a-b537-580370baffbd/ram_3500_truck.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/972977e4-356f-4ca4-930b-7f61a777df01/bufenufifem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8a73d59-9e61-4dfc-afaa-1c16af144e8d/jodisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35284f8b-b2cb-498a-bc61-ddb48dae61f0/13832006596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6f4da99-e2e2-47ea-9069-82e0f6b60c95/96695261200.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_off0000c5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F6 5068 bytes
SHA-256: bf81fa858834f7bfed8855a7030d6f7aa09900661eef9cacab8834f5663579f2
font_01_sfnt_off0000d707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD707 10084 bytes
SHA-256: 192776c4a62fd92e18d610e4d076620a98c026afd4ab2eb89e7b0e251e1bfecf

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