Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8262c2991599a03…

MALICIOUS

PDF

115.7 KB Created: 2020-11-14 07:21:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4ad3544e5575bcfe298dbe8c8bcc96f4 SHA-1: ccd48b0644ab6dce91fa32ad131428e0671f53f3 SHA-256: e8262c2991599a036d33a715ba9034255a6f37c067a4e8de1d0cfae59bc9cd35
222 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains links to known malicious redirector infrastructure, specifically 'ggtraff.ru', and a large number of other PDF links, suggesting a link farm or redirection scheme. The heuristic 'SE_INVOICE_LURE' indicates the document's content is designed to deceive users into clicking malicious links, likely related to payments or invoices.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://ggtraff.ru/123?utm_term=how+to+use+cvt+manual+mode In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376598/normal_5f9e0bc048649.pdfIn PDF document text
    • https://lalazifesulalo.weebly.com/uploads/1/3/4/5/134502535/vamawajobezebowesa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446147/normal_5fabcaf87e69b.pdfIn PDF document text
    • https://dasujodiket.weebly.com/uploads/1/3/4/4/134481559/1138233.pdfIn PDF document text
    • https://dadixuva.weebly.com/uploads/1/3/4/0/134018012/piwixoxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5f9ff15fbe974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5f8b359e1b07f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f88606195de8.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/f2b6f6c8-b377-42b9-8732-e1325d7c9ede/votinex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc090f1-164a-469b-9043-f2ac5e1436c9/finale_nota_yazm_program_trke_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/32348664022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b8de60e-eef3-4f4d-a43e-21317ac42e78/margin_richard_swenson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba56324-29b4-4c6f-b4c3-25fe3c01f6eb/5e_life_cleric_channel_divinity.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_off00018c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C23 5104 bytes
SHA-256: fb5ed4d2bb3a4fcfc02ab1aa3fcba321aab15e87494b32270ac78cca33091f2e
font_01_sfnt_off00019d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D7E 10632 bytes
SHA-256: 55db00cae794372aee0c41d7790b06268b28121b05e6be52dfd15658892f540c

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