Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d9c64806011dc6…

MALICIOUS

PDF

58.8 KB Created: 2020-11-14 21:04:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 276fdceea3a12f2ec2ffbc9d3416b51f SHA-1: 06b09005df43832762cee140dcedcd1b1deec90d SHA-256: e2d9c64806011dc6d629e2f1652fa52acb67206cd628d1d3cfa794fc9aa0c300
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://traffmen.ru/123?utm_term=cho+pat+strap+elbow In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_5fa221b133da3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421641/normal_5f98407cb7b6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_5fa18292ac872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5f8808cf49a60.pdfIn PDF document text
    • https://wufikasokuwomoz.weebly.com/uploads/1/3/4/3/134359410/foxefakavovapi-sakabewi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386836/normal_5f92994cc9fae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f89739b3700f.pdfIn PDF document text
    • https://batatifenosi.weebly.com/uploads/1/3/4/5/134513642/morebu.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/d11ea303-99b3-4877-bb9f-5de0ea698e9e/namowofutojijekena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6866270-0d89-4d98-be6e-02b4dd37bb14/golds_gym_stride_trainer_300_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e36c7a38-89f7-4e17-8eda-aa4544488640/viwemituf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c6fcab6-c325-4436-b5bb-91303aa1b6ea/yatming_price_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8f8da56-9c6d-4a69-afcb-d72968c00187/second_part_of_declaration_of_independence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3974f079-3cb0-4dc6-a383-414900811fae/85284838537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/285178eb-934f-410b-b4f1-916e38299975/ufc_237_live_stream_reddit_free.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_off0000ad3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD3F 5044 bytes
SHA-256: c4b5f09fa73c94a91693a8c6e551c99c3163557634a6e8269668979d5a66100d
font_01_sfnt_off0000be60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE60 9492 bytes
SHA-256: 0c898cc5ec76a6901ee284f6cc54018d121b796f043b426c76f704d921dae347

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