Malicious PDF — malware analysis report

Static analysis result for SHA-256 61937124802a9117…

MALICIOUS

PDF

68.2 KB Created: 2020-11-24 08:18:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7fe5a15ba467a5e0591ff27d8780b72f SHA-1: e4de52f279e345e9a8374695b15b5d7ef55579d0 SHA-256: 61937124802a9117a0191edfd47bafa351ae6f5988b24834c712e7d8e99ac0d7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a lure related to 'free Robux 2019' and embeds multiple external links, including one to 'trafffi.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or phishing operation. ClamAV also detected this as 'Pdf.Phishing.Trojan'. Although no scripts were explicitly extracted, the presence of embedded URIs and the phishing lure strongly suggest malicious intent.

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://trafffi.ru/strik?utm_term=how+to+get+free+robux+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417527/normal_5f9cf1c28ce92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391319/normal_5fa67b2f88a00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391037/normal_5f913838a1d4e.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/dudurojasav.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/54264a50-3f73-4004-b946-50939bea9faf/ropobunamexotololowojo.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/vagusazizipafenevag.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/arkham_asylum_100_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/lipamezujukibor.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/51224772677.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/lewis_electron_dot_structure_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d09ef2ab-ff40-494f-aa00-027e214e3437/ribbon_gift_card_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/starting_strength_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/seloxada.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/oxford_science_dictionary_free.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/35944832223.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_off0000d1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B3 5260 bytes
SHA-256: 473662e2fd4829e5dcc1d090889f99d8ebc756ab02932863c7e81c1f2da0e2e8
font_01_sfnt_off0000e3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D0 9496 bytes
SHA-256: 1d7be6f52f9fd840bdcd9f955008c62ad822dc7e38b449578b6ed8d3263bf52d

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