Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1cc1298b66b6917…

MALICIOUS

PDF

72.2 KB Created: 2020-12-18 23:44:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: dff501673ac5089ea4ac1f26460b66e0 SHA-1: 794fb914885f7b1346c904e2bbd6dc4052deea23 SHA-256: d1cc1298b66b69179aa7e7ca8dc03cc63e395e57ebc98991be36029dea556a57
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with one suspicious URL pointing to 'trafffe.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host and distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://trafffe.ru/strik?utm_term=pathfinder+orc+weapons PDF link annotation
    • https://mitigovoponezix.weebly.com/uploads/1/3/4/3/134375948/5b986.pdfIn PDF document text
    • https://zuzilenew.weebly.com/uploads/1/3/4/5/134527977/vubujotisunoda_sazosediwamut_kojasomidezato_savuvabiwozugu.pdfIn PDF document text
    • https://mipijipibax.weebly.com/uploads/1/3/4/8/134873473/jigukimemunibat.pdfIn PDF document text
    • https://wubawujol.weebly.com/uploads/1/3/4/2/134266052/2160614.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
    • https://static1.squarespace.com/static/5fc16072e9fc3622d52570ce/t/5fd1ed8f0f163860c7b22ce4/1607593360335/kid_rock_songs_northern_michigan.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/zisapaxinipelemabite.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6d84b5f0d731e16a86864/t/5fcc76647ae85b53b28a886d/1607235177116/40935100333.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/53574008875.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/36310549139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85e86820-d938-40e3-ad1a-959deb18ae98/xolobarakabumibafupomije.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78fa9f784ea513680d888/t/5fd6338a154d727871e53d3e/1607873418769/mozevolu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f926a879396864223f82/t/5fc54b04cb3e0f5771fdf11d/1606765318190/85288075138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f049f5e-fcf2-4cd2-8b95-4d9b387560e9/what_is_micro_flannel_made_of.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0E 5092 bytes
SHA-256: 631e79ae5c193e897f52bcb9a1e44c402f1bc381ea6edf693483127459ea06a6
font_01_sfnt_off0000e055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE055 10984 bytes
SHA-256: be83c41a711e71ecba25042ca40734be5d22e13d5591fd872c89b5dbf429aff8
font_02_sfnt_off000105c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C0 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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