Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b4d72df0e441ab6…

MALICIOUS

PDF

73.0 KB Created: 2020-11-10 11:56:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 402a972f87c2a710b91ac0cd9884faf8 SHA-1: 729940241a2ef5aa80dedb20203ddb95112a36e5 SHA-256: 3b4d72df0e441ab6d2cd89a40a2aca6ccd0995542a4125292f6ab459fe24c19a
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, such as 'https://trafficel.ru/aws?keyword=craig+jones+slipknot+net+worth', suggests a link farm or redirection strategy. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of phishing or malware distribution attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/aws?keyword=craig+jones+slipknot+net+worth PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369182/normal_5f8b4d5932f0e.pdfIn PDF document text
    • https://sexanugujox.weebly.com/uploads/1/3/4/2/134266496/1664893.pdfIn PDF document text
    • https://xexofomes.weebly.com/uploads/1/3/4/4/134489610/kewivajuviro-velobekifetipod-tagevakogo.pdfIn PDF document text
    • https://sasakafu.weebly.com/uploads/1/3/4/3/134371045/336054.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/ruvus_fexafurimiditi_tamasetodefa_gimajubadare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f8883e421f7e.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://uploads.strikinglycdn.com/files/b39b5b1d-5b9b-45e9-b656-b0422c57b911/damalujamemepoxonedomal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acec92cc-0adc-4530-8c4f-ae8e4ca4967f/romizilatosevubivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f854230e-4da4-40b7-b405-4d1765943468/clean_master_indir_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef49e19c-b59c-4e87-8fbf-652ddb8d8ebd/55560246518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a62de8-9bb5-4cef-8088-7240202351c0/wobebirabali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a457942-7168-4209-97c6-e92d3a3940f2/sample_transmittal_letter_for_documents_submission.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8d9bd77-72cb-4d68-a957-e281bcf57e9e/bullet_force_unity_webgl_demo.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_off0000d2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A9 5124 bytes
SHA-256: d42e34cc33c5c4160ebfecc751e063ab7d9bca678fa3caf5905b81892cd1a297
font_01_sfnt_off0000e41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41F 10908 bytes
SHA-256: d7c7867a074173b65a3d7e7c0b17c6eefb062141af0a358ce62df019ed4d1aa1
font_02_sfnt_off0001091d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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