Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b9b79502a21c31…

MALICIOUS

PDF

75.5 KB Created: 2021-03-27 23:12:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2204353a622404cc1e0e961b7844572b SHA-1: a5dc6ee2a4ff2a4de1cc1dc30c200cca2b94755e SHA-256: d0b9b79502a21c315ae33c1fb03489c8dfa5f5b8d6ea86a32c6a696ccb69d01b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely leading to a second-stage download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://xajibur.ru/strik?utm_term=cuantos+son+2+m+en+milimetros PDF link annotation
    • http://bitjoms.xyz/why_is_my_washer_not_spinning_and_drainingumvg3.pdfIn PDF document text
    • http://yourlivehelp.com/95100946040sbx0f.pdfIn PDF document text
    • https://cdn.sqhk.co/gujipiror/0Jjahcv/sad_love_story_to_read_in_english.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393647/normal_5fffc626376b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_6044cf4968cd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480744/normal_605bc5bae451c.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/igJjiJc/rejil.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/80451092113.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485578/normal_5fd07bd26861b.pdfIn PDF document text
    • http://cheatyou.site/elasticsearch_index_template_refresh_interval9rsw5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wawavaroxu.myartsonline.com/apnea_del_sueo_central.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/supefirevipuruxotujata.pdfIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_126eb7d2d3be40088fd0eda13e6f40f7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/bluestacks_2_ios.pdfIn PDF document text
    • https://96ea5dd8-6962-4d57-b29c-fb233a715e3b.filesusr.com/ugd/ac3463_efb0d21180634ab4be5c03ba823ca746.pdf?index=trueIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_046ee0acbba44e358898cfaa42e4d516.pdf?index=trueIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_faa3d7cf0f83401391ab19416ec0e5a9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zidenigad/coupon_website_html_template.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/nesobifigemexezozifej.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/firaxurebekowarelugikojix.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_off0000e8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AA 4868 bytes
SHA-256: 8448d8848ce1e8e8dafc7121c3565d44b2964900b95f018d6f6a71009d224d41
font_01_sfnt_off0000f913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF913 12264 bytes
SHA-256: 84edf85752da4709d051b4fc48bd3015ebfccb947890c6fa416a33e13e9265e6

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