Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec29fcd504eb236…

MALICIOUS

PDF

89.5 KB Created: 2021-02-16 21:40:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a0438231836049e3e17534476323ca54 SHA-1: 2e5766ef5f447efd0e1a16988d8b076e1fa857ac SHA-256: cec29fcd504eb236ca2f430c48e3c63a16f6d8c8b92ef33654c1e8ce93cce833
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with a significant portion pointing to potentially malicious domains, suggesting an attempt at SEO link farming or redirecting users to phishing sites. The presence of embedded URLs and the overall structure point towards a malicious document designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=tour+guide+speech+in+boracay PDF link annotation
    • http://gatorama.site/83233209317cmh50.pdfIn PDF document text
    • http://onesmall.space/alcohol_120_full_crackblgay.pdfIn PDF document text
    • https://rasisepuwefu.weebly.com/uploads/1/3/4/6/134678142/jisujub.pdfIn PDF document text
    • http://3-bureaureport.info/slang_words_in_english_with_meaningqzvvb.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/petubapizo/bleacher_report_chelsea_news.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/lobstrosity_guide_osrs.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/kafoxiwudomo.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/pajajelobipijasa.pdfIn PDF document text
    • http://baxomotob.rf.gd/how_do_you_say_yahuah_in_hebrew.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/ielts_test_papers_with_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CF 5496 bytes
SHA-256: d813d96ef01b7f7b84549e19ad9acfef68e6237cdd3f14c655380704f3ee8c32
font_01_sfnt_off00011472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11472 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00011d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D00 10964 bytes
SHA-256: 9e948f3226dcb83b958f39d420544b8c9906601daab38adb06ae8c094090b274
font_03_sfnt_off000142a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A3 16376 bytes
SHA-256: c3d0ee408bee49a88931d2ac630a9fb52e88a46fabab5a72aa19e78bbe1d3826

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