Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a82ded34409bcc…

MALICIOUS

PDF

80.0 KB Created: 2021-03-24 10:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0d0ce07f2ce3764005813caf3f785c6e SHA-1: 491ae32d9d3e892891cee66cffce7167f54a7180 SHA-256: 15a82ded34409bcc6ac617a3e529982741903202f12b61b341d6c243162dce3c
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm, suggesting a phishing or scam operation. The document body, though heavily obfuscated, contains references to wkhtmltopdf and a date, but no clear textual lure. The presence of external URIs and the link farm heuristic strongly suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/strik?utm_term=what+is+macroeconomics+in+hindi PDF link annotation
    • http://pro-komp-master.website/audacity_record_computer_audio_windows_109lr0h.pdfIn PDF document text
    • https://cdn.sqhk.co/velizovatim/uieigkY/empires_and_allies_cheat_codes_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447437/normal_5fca395709693.pdfIn PDF document text
    • https://cdn.sqhk.co/ranuvore/YgKjbgc/ruvumidemitilirijose.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/27749838319.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469828/normal_5fd0e3a1f3853.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/advanced_plant_systematics.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzirixowev/JihjBja/realm_grinder_builds_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420902/normal_6014db1451284.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/dunkin_donuts_vanilla_bean_iced_coffee_recipe.pdfIn PDF document text
    • http://xazupadapafow.mypressonline.com/alice_munro_selected_stories.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/GUjbhhw/nijipedateneg.pdfIn PDF document text
    • https://cdn.sqhk.co/fekerepusa/Mugh2gg/s_chand_physics_class_9_solutions_motion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_6046452bf0d8c.pdfIn PDF document text
    • http://bitalotava.scienceontheweb.net/affidavit_of_birth.pdfIn PDF document text
    • http://acupofjacob.com/how_to_explain_integrity_in_an_interviewknnu3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376362/normal_604ecb6773e03.pdfIn PDF document text
    • http://vosajizegek.mypressonline.com/ielts_band_9_task_1.pdfIn PDF document text
    • http://narawodosure.medianewsonline.com/46846694.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://rewuwuja.onlinewebshop.net/how_much_do_vita_spas_cost.pdfIn PDF document text
    • http://sinusisokopex.atwebpages.com/5815860889.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFD 5160 bytes
SHA-256: 847a038ab6bf3c48c99b8b72db8dfb0eb56131f0c116d19ce49fa0eb3a1c00ca
font_01_sfnt_off0000ed66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED66 14828 bytes
SHA-256: 3879ad59d2ab2d26a33a083f1e56e8fbff4468a8e0fab8ac963cce5943f1b3cd
font_02_sfnt_off00011e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E07 5056 bytes
SHA-256: 2fec979fd46b9c50049cc5e1e6de4ede83d719aad56fa251fc9c37824e2be4cb

Open this report in the interactive analyzer, or submit your own file for analysis.