Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd07a63b652f6166…

MALICIOUS

PDF

82.4 KB Created: 2021-02-18 13:52:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 06563d797fc10af96955f59c5955032d SHA-1: 18352494f4533a3dfb4489a87ee59bde4bf1199c SHA-256: dd07a63b652f6166e838e0ad7b9df854421b4992da7b136d3f266b438a6cae51
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with a critical heuristic firing for a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL 'https://yafferge.ru/wix?keyword=wen+4212+drill+press+parts' is a primary indicator of a phishing or malicious redirection attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=wen+4212+drill+press+parts In PDF document text
    • https://cdn-cms.f-static.net/uploads/4489839/normal_602442d9ee9f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368997/normal_5fdc57eec6875.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480173/normal_5fe43d67dd034.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/xafijimirekutes.pdfIn PDF document text
    • https://dudafenerow.weebly.com/uploads/1/3/4/9/134900552/wojatis_lumamidam_gaxegukawosut.pdfIn PDF document text
    • https://rebavunegiluzu.weebly.com/uploads/1/3/4/4/134497465/lilikanifozilonukili.pdfIn PDF document text
    • https://ponefapu.weebly.com/uploads/1/3/1/6/131637257/zabotunoke_sisopofibemapi_jodedodorone.pdfIn PDF document text
    • https://kofasarafafe.weebly.com/uploads/1/3/5/3/135390193/segavisugogovafelow.pdfIn PDF document text
    • https://rusizatigaj.weebly.com/uploads/1/3/4/0/134041601/221094.pdfIn PDF document text
    • https://letogapebo.weebly.com/uploads/1/3/5/3/135320268/a471a5a469012bb.pdfIn PDF document text
    • https://ruzuwigowan.weebly.com/uploads/1/3/1/4/131453288/6c858b707d9e.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/pozokimepe/fisefulena.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/zotitadi.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/83184045700.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/petipezuxepajafobuxubej.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/banjara_dj_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/dnd_5e_warlock_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/98612662.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_off00010428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10428 5236 bytes
SHA-256: 82c3db6897ed4ac823827e659d6f6a8b5b9070e7a21c6df4462daba8bfe2f08f
font_01_sfnt_off0001161f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161F 11104 bytes
SHA-256: fbdb664d7805abeb80d97ba3f17625a37f48aa235d957e2cc6cc51a5e6ac726b

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