Malicious PDF — malware analysis report

Static analysis result for SHA-256 af348a7dab93117a…

MALICIOUS

PDF

76.1 KB Created: 2021-02-13 05:14:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f2af9079b2aeae622fef17388cc9bfa7 SHA-1: 600206de9ee82cb8b54cbf01394989fca0189ef9 SHA-256: af348a7dab93117a3c91948e9c0d15ae81c7a5a67d49d6a76678e9edc62f9c95
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL suggesting a lure related to "Ontario birth certificate protector". Heuristics indicate the PDF is a link farm on disposable hosting, and ML classifiers and ClamAV strongly flag it as malicious. The presence of embedded URLs and the nature of the lure suggest this document is designed to redirect users to a malicious site, likely for phishing or malware distribution.

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 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://leonvi.ru/123?utm_term=ontario+birth+certificate+protector PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451971/normal_5fdc273678733.pdfIn PDF document text
    • https://pafuxasakilufa.weebly.com/uploads/1/3/5/3/135327400/budabojasizazemugek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_601e6c479c329.pdfIn PDF document text
    • https://nobixerevogug.weebly.com/uploads/1/3/4/4/134481004/sukebalat_tuzoj.pdfIn PDF document text
    • http://notudokebifapaf.22web.org/1000_abaddalu_full_movie_free.pdfIn PDF document text
    • https://dataremidesop.weebly.com/uploads/1/3/4/6/134697992/joposiminetu-kelubi-sunagidumujojov-ruvuwasedefusu.pdfIn PDF document text
    • https://cdn.sqhk.co/babonisu/geUigj9/make_a_birthday_list_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369926/normal_5ffa1046cfca9.pdfIn PDF document text
    • https://sadavofabuloxus.weebly.com/uploads/1/3/5/3/135316226/wavafuwegiduz.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/bebezejawaxoxov_duxenit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411001/normal_5fe4f705e5974.pdfIn PDF document text
    • http://tefosewun.22web.org/aoi_bungaku_ost.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muwovulal.epizy.com/bugaromokagazefijef.pdfIn PDF document text
    • http://kenuxiximusopev.epizy.com/39486031779.pdfIn PDF document text
    • http://memaded.epizy.com/old_bet9ja_app.pdfIn PDF document text
    • http://kunijudodo.rf.gd/reporting_accidents_at_work_template.pdfIn PDF document text
    • http://kutadomirezo.rf.gd/joe_mettle_turning_around_mp4.pdfIn PDF document text
    • http://julopok.epizy.com/dsssb_ntt_exam_answer_key.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1F 5060 bytes
SHA-256: 90f49b55c2caf298830011db38982bd96cac9f5e8f024b995830ad4bcf51dc72
font_01_sfnt_off0000ff50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF50 10368 bytes
SHA-256: 6b78a01c0264ad936a7a687bb4db7c1a9ccd153a33732df3b638aa35aae8f96f

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