Malicious PDF — malware analysis report

Static analysis result for SHA-256 33feaffbf0a59709…

MALICIOUS

PDF

65.1 KB Created: 2021-02-19 16:36:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c048c75e998abec63311e2d36a96e1b6 SHA-1: 54d0f9168512d8d396b177e02cff8ac2b4e8d13e SHA-256: 33feaffbf0a597099a04a2e143a5073933b1d3b19fb24a9348c8775fc40a51ef
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, including a link farm pointing to 'http://org-fruit.space/nigoruxebivoravuraxjn.pdf', suggesting it's designed to redirect users to potentially harmful content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest a phishing or malware distribution scheme.

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://seumenha.ru/wix?keyword=the+elements+of+style+stephen+calloway+pdf PDF link annotation
    • http://org-fruit.space/nigoruxebivoravupiasxjn.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/7igSGLE/57327785508.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/Ijighjd/hack_game_kick_the_buddy_2.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/aMjKih7/wavepad_audio_editor_free_download.pdfIn PDF document text
    • http://winsbig.space/tisosefuzolotesapulekazhasg6.pdfIn PDF document text
    • https://situzofunuk.weebly.com/uploads/1/3/5/3/135305293/nakavivukod.pdfIn PDF document text
    • http://meetdouche.xyz/international_commercial_agency_agreement_templatelvpcr.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/regufojalojaza/wedding_anniversary_pics.pdfIn PDF document text
    • http://zipoxibel.epizy.com/6960892410.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/inverse_linear_functions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/latale_warrior_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/poximadikopila.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/25292063114.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_off0000c13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC13B 5440 bytes
SHA-256: 4a50b7ed3a72fd8adda6553823fd4f3526bd95f20a72196c6e291346d526303b
font_01_sfnt_off0000d3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B2 10560 bytes
SHA-256: ed058ff69e2d5caba11737fb77de529c747796c73856c426b60f56ac2f7b7974

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