Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f60ee1e6bb355fb…

MALICIOUS

PDF

74.8 KB Created: 2021-04-04 20:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b4e702bcef5c38ba4f447103789415a0 SHA-1: c0510cbe4b92473dc1868a4a8241344463425aca SHA-256: 5f60ee1e6bb355fb894f6569b43a9fe8fb65c5db69cc65751f8f0c1f190167dc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to disposable domains, which is characteristic of phishing or link-farming operations. The presence of these links and the overall structure suggest an attempt to lure users to potentially harmful websites.

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://kuzutuzo.ru/strik?utm_term=how+many+miles+do+honda+shadows+last PDF link annotation
    • http://tofotibuwul.sportsontheweb.net/application_of_computer_in_different_fields.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/jdih0xE/44123359620.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485702/normal_5ff25ce1a8b75.pdfIn PDF document text
    • https://cdn.sqhk.co/tenalewi/QdicicG/ziraveletasawufezarup.pdfIn PDF document text
    • http://derapom.iblogger.org/aluminium_hydroxide_davis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377113/normal_5fed17aee891b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_5fd78d0986f3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463812/normal_604a43a7e61d0.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/eMibvib/bricks_breaking_2_game_play_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422890/normal_5ffa07979cd75.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/gawabog/solo_leveling_reddit.pdfIn PDF document text
    • http://wutopurejopagus.epizy.com/the_green_mile_boss_quotes.pdfIn PDF document text
    • http://zakuvusebaj.epizy.com/baker_act_form.pdfIn PDF document text
    • http://zezofakarol.myartsonline.com/20_lectures_on_algorithmic_game_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/new_mexico_biennial_report_due_date.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/royal_adelaide_show_showbags_guide.pdfIn PDF document text
    • http://vogojitipam.epizy.com/41111616853.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/17617500063.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/kiwaxul.pdfIn PDF document text
    • http://wifipuve.epizy.com/bayesian_statistics_the_fun_way_amazon.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_off0000e7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C0 5124 bytes
SHA-256: 074a64faded260217784d51ee0e104991520e88a4c3f7723818fdd7051e962dc
font_01_sfnt_off0000f914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF914 10908 bytes
SHA-256: e298630833864c4b3d5bba8edb140551e44f545182515e4b7f45f97090c8fe35

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