Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1402ca85997767d…

MALICIOUS

PDF

75.2 KB Created: 2021-03-16 16:58:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4b8e4ca80960fd75f51b8fc5c77a8b58 SHA-1: 5e352ec8ddd619876a0de1b7aa73d6c938352ffb SHA-256: a1402ca85997767dfb2969dc359d80dda6cc34b9308f1cf08d4e983e058b5760
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URLs and the PDF structure suggest a phishing or scam attempt, likely to redirect users to malicious sites. The presence of numerous links and the use of disposable hosting point towards a link farm designed to obscure the final malicious destination.

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://baarspo.ru/strik?utm_term=stacking+kit+for+washer+and+dryer+maytag PDF link annotation
    • http://frasqen.online/8865387330doa2j.pdfIn PDF document text
    • http://fewaxizix.iblogger.org/burrhus_frederic_skinner_biografia.pdfIn PDF document text
    • http://mebelintera.ru/just_stick_with_it_synonymsggb3e.pdfIn PDF document text
    • http://indohealth365.online/roomba_655_battery_resetp2hgi.pdfIn PDF document text
    • http://dream-stat.ru/dexofenexubalz37s.pdfIn PDF document text
    • http://uplrezina.site/participles_as_adjectives_worksheetkmq1c.pdfIn PDF document text
    • http://yesitalia.fun/nea_marin_miliardar_film9hq87.pdfIn PDF document text
    • http://pemewozeresozo.22web.org/58682133803.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/tank_recon_3d_lite_downloadh3jux.pdfIn PDF document text
    • http://mx50off.info/tp-link_tl-mr3020_setupt6pcy.pdfIn PDF document text
    • http://oneshops.space/glute_hypertrophy_program_robin_gallant3cctg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xoxiposewarewa.epizy.com/maplestory_2019_training_guide_reboot.pdfIn PDF document text
    • http://solujenujaki.epizy.com/dolphin_emulator_latest_apk.pdfIn PDF document text
    • http://sidakofonol.epizy.com/gedoxudisefelafur.pdfIn PDF document text
    • http://gusalixofunek.epizy.com/chicago_manual_of_style_primary_source.pdfIn PDF document text
    • http://lugirike.epizy.com/interactive_brokers_account_management_user_guide.pdfIn PDF document text
    • http://jikokajogov.rf.gd/sanesazo.pdfIn PDF document text
    • http://tatasoge.epizy.com/brushed_cotton_bedding_fitted_sheets.pdfIn PDF document text
    • http://tereneduzoz.epizy.com/worofojil.pdfIn PDF document text
    • http://lagidifej.rf.gd/jill_poole_textbook_on_contract_law.pdfIn PDF document text
    • http://fepufikegag.rf.gd/pesopivagipuzixagu.pdfIn PDF document text
    • http://getetir.epizy.com/archicad_library_objects_free.pdfIn PDF document text
    • http://fesejawezu.rf.gd/eevee_evolution_guide_sun_and_moon.pdfIn PDF document text
    • http://kesesisad.rf.gd/13637440735.pdfIn PDF document text
    • http://somilawa.epizy.com/tegerurel.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_off0000e3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D2 5764 bytes
SHA-256: 9d0b64ac240659850661dd82f81b0c53806df71cca9143ba5d5a68252cb26b5e
font_01_sfnt_off0000f768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF768 11272 bytes
SHA-256: d57e6ff8f088290aeb6d2ac63a670a9bf42c712c59e8c265662d3e47fb644f97

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