Malicious PDF — malware analysis report

Static analysis result for SHA-256 145f8ddc91e8b55a…

MALICIOUS

PDF

69.0 KB Created: 2020-11-18 17:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: beaf3ffc0b86c69f29d3572d4f81ed79 SHA-1: 025e0962678de083ad28f595611c3b013aa75ed5 SHA-256: 145f8ddc91e8b55a41d008402dc561651625a7b390880e19d76620a1b4b59919
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://traffnew.ru/123?utm_term=red+queen+sword+amazon', which is likely used to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

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://traffnew.ru/123?utm_term=red+queen+sword+amazon PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444643/normal_5f9f8f5e64ada.pdfIn PDF document text
    • https://rifonaro.weebly.com/uploads/1/3/4/6/134679964/godezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427501/normal_5f9cb7f3ab6ed.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/8276185f.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/50eb3a72-7385-4568-be89-b97402f2b33a/42424594269.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/hydrocosamine_for_rattle.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/63950724771.pdfIn PDF document text
    • https://s3.amazonaws.com/remoxi/peoplesoft_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/difigurukipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae4f3a5f-5468-4bfa-9376-1d32a7aeb43e/dfas_mypay_civilian_contact_number.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/vexemopukijabuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9effc51f-9ce8-41b3-9d0f-3d83696ab455/gavusudosafifetetizewu.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/toxixeletabefo.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_off0000c84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC84F 5216 bytes
SHA-256: 2ba52514bfde426c9d909a6076b01ece4ebdcdab91aad6c4689a520e3f372bd7
font_01_sfnt_off0000da10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA10 13972 bytes
SHA-256: 002d424a82a70524576f9275ef38cb8d47533f27ca9a34ebdbb07fbd4cb10e3d

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