Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80d7465fb365dd3…

MALICIOUS

PDF

77.3 KB Created: 2021-05-17 04:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cb724380e09baf44330f676a9f2011e6 SHA-1: 12254cbfb7b25ddcca50dd45ac141a04c3285526 SHA-256: b80d7465fb365dd3fa1acd3d5cc666c943634ca2d9ef9e59c44c496cd56d370c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/strik?utm_term=nespresso+ues+nyc PDF link annotation
    • https://pugotaba.weebly.com/uploads/1/3/5/3/135302821/valozo.pdfIn PDF document text
    • http://ufenmac.com/61206434039v8o4p.pdfIn PDF document text
    • http://instasurprise.online/aicok_ice_cream_maker_bl1500c_manualw77mh.pdfIn PDF document text
    • https://vitafidazi.weebly.com/uploads/1/3/4/7/134728623/gumuwit-fatozamaruxume-wejikalijafowuz.pdfIn PDF document text
    • http://123dutch.com/78390308240kyicf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467004/normal_60446fdca806f.pdfIn PDF document text
    • https://wimavebitajiki.weebly.com/uploads/1/3/4/6/134609796/nawemurakozodawegere.pdfIn PDF document text
    • https://zepafasamog.weebly.com/uploads/1/3/4/3/134361306/jakevar-pekusexuzibuso-gutudu-nilete.pdfIn PDF document text
    • https://dutajedi.weebly.com/uploads/1/3/5/9/135964159/d430f6ea.pdfIn PDF document text
    • http://onatural.space/defevofitituwvz9du.pdfIn PDF document text
    • https://purotuduveb.weebly.com/uploads/1/3/0/7/130738796/miponux.pdfIn PDF document text
    • https://zefojakafi.weebly.com/uploads/1/3/0/7/130776787/9687194.pdfIn PDF document text
    • https://mekufaro.weebly.com/uploads/1/3/5/2/135294947/lujus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459796/normal_604138455ec54.pdfIn PDF document text
    • https://pagejenaxupiwig.weebly.com/uploads/1/3/4/3/134383440/1054597.pdfIn PDF document text
    • https://jadafuvirop.weebly.com/uploads/1/3/2/7/132710722/nofaziwufot-vajaragaw-jojizinanolase.pdfIn PDF document text
    • https://gerudupox.weebly.com/uploads/1/3/2/7/132712596/nobelupowisagiweja.pdfIn PDF document text
    • https://gejejemimegi.weebly.com/uploads/1/3/4/8/134899280/fubak-pedot-gezobeb-zenerid.pdfIn PDF document text
    • https://topalezomezo.weebly.com/uploads/1/3/4/3/134305389/1986827.pdfIn PDF document text
    • https://xuvelufuxilo.weebly.com/uploads/1/3/5/3/135387868/099d36.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/tudawufed/dutch_chamber_of_commerce_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/67067710679.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/woluz.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_off0000f029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF029 4756 bytes
SHA-256: ced72317be95ce5a9b9fbce203ac4ddb7885af76674e80e9e52cc163caf61402
font_01_sfnt_off0001007a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007A 11208 bytes
SHA-256: 04c0a0d0dd667dc7b086feb6c7f8353da8b3d2b0b92d09b233c148363460f08c

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