Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33be6ce6baf39cd…

MALICIOUS

PDF

76.0 KB Created: 2020-12-27 15:06:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8ab2492c1db4f536851953433a159537 SHA-1: dd5c397fb18f31a4dac2ff04c67e6d19f476540b SHA-256: c33be6ce6baf39cda587dded105941086fe2f9d419b70adee1473a147f9c3d66
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL that appears to be part of a phishing or malware distribution campaign. The presence of a 'download button' heuristic and ClamAV detection further supports a malicious intent. While no scripts were explicitly extracted, the PDF structure and URL findings suggest it's designed to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/strik?utm_term=epic+battle+simulator+2+indir+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379473/normal_5f9244271354c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f8d957a69097.pdfIn PDF document text
    • https://zexaloguf.weebly.com/uploads/1/3/4/5/134576330/vuras.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424026/normal_5fd229a5d60f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_5fa2f481b1217.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453901/normal_5fe24f62c8ae3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dotivaf/school_catchment_area_winnipeg.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/kibuvilevosij.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/breathless_all_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/cancer_man_yahoo_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/rubujapasunidip.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/zasudifasujowuxivo.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/congratulations_hamilton_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/gonifebabinomitipikawu.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/atonia_uterina_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/beduresuji.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_off0000e2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D2 5448 bytes
SHA-256: c3804cd22775663bf4ff9802447b89a2257c9d57b2ed98ed7432cc9c881fc944
font_01_sfnt_off0000f534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF534 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000fdc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC1 10896 bytes
SHA-256: b4df88037bd574b14c0dc5b64bcbf1b403070d1fcbe02a631e256057868a7563

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