Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fee0e4779dd9451…

MALICIOUS

PDF

73.5 KB Created: 2021-03-05 06:34:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f51392e7b45b1377ad0479c94c192c9e SHA-1: 750d2a6b0f36f9406788dfc15a48bff25d132da9 SHA-256: 4fee0e4779dd9451ed9e619f028f04e5e73f59c9934ee101b7ad175c83f0e385
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL suggesting a phishing or malware distribution attempt related to 'autostart remote start'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=how+to+reprogram+autostart+remote+start PDF link annotation
    • https://nozudepoget.weebly.com/uploads/1/3/1/1/131163917/148707.pdfIn PDF document text
    • http://babozim.22web.org/neonatal_hyperglycemia_guidelines.pdfIn PDF document text
    • https://dudunetexuzo.weebly.com/uploads/1/3/1/3/131379759/nabekebaj-pulagogabonoz.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/gghhMTN/cake_maker_cooking_game_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/jahd5g3/fun_facts_about_space_weather.pdfIn PDF document text
    • http://bikupiribofaz.iblogger.org/furaxapobaviliwovonoveb.pdfIn PDF document text
    • https://lavozeto.weebly.com/uploads/1/3/0/7/130775819/woruluvodode_peberuwivuxudax_bugumelezer.pdfIn PDF document text
    • https://fukorolavo.weebly.com/uploads/1/3/4/6/134639224/1261537.pdfIn PDF document text
    • http://rebituzugofebo.22web.org/26977867837.pdfIn PDF document text
    • http://loneresel.mygamesonline.org/jokojetedimuzubememiji.pdfIn PDF document text
    • http://wixujikubipom.mygamesonline.org/dir_615_e3_dd_wrt_firmware.pdfIn PDF document text
    • http://zitirisiz.mywebcommunity.org/10797655935.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/51795640934.pdfIn PDF document text
    • http://fishland.store/japafuxixudakogibb1f5n.pdfIn PDF document text
    • http://fodamibokaf.66ghz.com/hssc_clerk_haryana_admit_card_link.pdfIn PDF document text
    • http://55571.ru/wisepay_app_not_workingmpntl.pdfIn PDF document text
    • http://sberhome.ru/the_american_idea_by_theodore_white_answers2eqro.pdfIn PDF document text
    • https://gipulafu.weebly.com/uploads/1/3/4/4/134442702/0fbcd856513.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tajapog.rf.gd/niwiro.pdfIn PDF document text
    • http://gowegonuma.epizy.com/android_auto_beta_apk.pdfIn PDF document text
    • http://kuzemepusiloj.onlinewebshop.net/46335468229.pdfIn PDF document text
    • http://dolifusekaxug.epizy.com/75637320698.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_off0000e29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29D 5160 bytes
SHA-256: a4636675cd177e403d634f6101159764e3a77a99a6c7629b3ede248b3bdaab8a
font_01_sfnt_off0000f427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF427 10576 bytes
SHA-256: b02a65bccc6a1c925d0eb16516aa1fb92b9f33cf958faec8e2b51dba1a814cda

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