Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36a6122b119cad9…

MALICIOUS

PDF

86.5 KB Created: 2021-02-25 17:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: aab5ac0c6c446a57022e1dfddf32a92e SHA-1: 382a9eb8d9906e6f029e5f928c1073616f557b86 SHA-256: f36a6122b119cad978de32bf6463764284f5e7f971ec50de318f1e654a4057c2
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing infrastructure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the use of disposable hosting and UTM parameters, common in phishing lures. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest it's designed to redirect users to malicious sites.

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://jottigo.ru/strik?utm_term=how+do+you+replace+the+burner+tube+on+a+weber+genesis+grill PDF link annotation
    • http://gejesixave.scienceontheweb.net/what_do_you_talk_about_in_a_safety_meeting.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/nikon_f5_manuale_italiano.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/7368194190.pdfIn PDF document text
    • https://pabixiwirixe.weebly.com/uploads/1/3/1/0/131071256/vipaj-savemevexaxog.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/25019116424.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/common_words_in_english_used_in_daily_life_with_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/gdh1hhc/guess_the_movie_malayalam.pdfIn PDF document text
    • http://topstudy.fun/88481194290wg6fh.pdfIn PDF document text
    • https://xomitemekebok.weebly.com/uploads/1/3/4/8/134881854/4f1ad2cb.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/career_development_smart_goals_examples.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/how_do_i_reset_my_samsung_vrt_washer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/crescendo_becca_fitzpatrick_ebook.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/domufi.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/xofuriluzobuvu.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_off000110af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AF 5632 bytes
SHA-256: 2651cdfc4d0e69cc729f73b8ceee4121238c25a6012a389959c9a4ab286186ff
font_01_sfnt_off000123da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DA 11516 bytes
SHA-256: d158ee8b95df4c6776e00c7ab4ac6d7fcff53707c3da9b3dda771a853a3806fc

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