Malicious PDF — malware analysis report

Static analysis result for SHA-256 c908f8e6194effee…

MALICIOUS

PDF

76.0 KB Created: 2021-04-15 23:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 03acb3e11afc75fdc872146d785627f8 SHA-1: b447619b00e507b25b65093377b52bf0a0f2e266 SHA-256: c908f8e6194effee58ca779257fa69de893a82e996b356c3281b13957ff385d0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to a search query, directing users to potentially malicious sites like https://dugedepap.ru/strik?utm_term=how+long+do+you+cook+a+rump+roast+in+a+pressure+cooker.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/strik?utm_term=how+long+do+you+cook+a+rump+roast+in+a+pressure+cooker PDF link annotation
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453743/normal_6064b55a71823.pdfIn PDF document text
    • https://fubagodesipura.weebly.com/uploads/1/3/4/3/134326772/narules.pdfIn PDF document text
    • https://kukurako.weebly.com/uploads/1/3/5/3/135321284/ee32df0a2a.pdfIn PDF document text
    • https://wexarasi.weebly.com/uploads/1/3/4/3/134351888/7896a5.pdfIn PDF document text
    • https://marevesebogu.weebly.com/uploads/1/3/0/8/130813877/2221491.pdfIn PDF document text
    • http://flathead.us/nonovakamoxqd2to.pdfIn PDF document text
    • https://cdn.sqhk.co/fematixub/l8hbI1f/21567315090.pdfIn PDF document text
    • http://ses-paypal.com/trilogy_200_ventilator_user_manualoukui.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/g6WH5XA/womeramu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463279/normal_604da42091d40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480594/normal_602071d4afea5.pdfIn PDF document text
    • http://free-at.pro/61863718926umswz.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/310382659323esg6.pdfIn PDF document text
    • https://gowapatemik.weebly.com/uploads/1/3/5/3/135319450/tejek.pdfIn PDF document text
    • http://gomotejux.iblogger.org/kuzuwukodib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420766/normal_60476fd17fe7f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magikid.epizy.com/cv_xin_vic_mu.pdfIn PDF document text
    • http://gukojubare.rf.gd/eau_guidelines_bladder_cancer.pdfIn PDF document text
    • http://jawigunomuj.epizy.com/vezid.pdfIn PDF document text
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_ad1df6721abf4d3fa2f1e0c6a0b66588.pdf?index=trueIn PDF document text
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_ead3031f86cd4f77811124a30b5f98c9.pdf?index=trueIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_2ef62a3f9d7c4c2e9ced476a2611aded.pdf?index=trueIn PDF document text
    • http://vujapaporetakik.epizy.com/the_last_song_book_read_online_free.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_off0000e9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DB 5612 bytes
SHA-256: 4010dc43134468a862d0ebcff1ed868d7df8b6e950d58866ee88cbc8887ea98b
font_01_sfnt_off0000fd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD00 11032 bytes
SHA-256: fad2ad52ba53ff30ed3420d71fc9d6aae94e8eb126788426ea630bdf13cf1ef3

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