Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f4d17bd5f732a18…

MALICIOUS

PDF

80.5 KB Created: 2021-05-11 07:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0f51d12c4293eb7ad67c8f368eae18f4 SHA-1: 75366de9b7e0ef6fefcd2c40dfc21109d1955c14 SHA-256: 0f4d17bd5f732a186acad99c00fe920c3bc4ae4770dbdd91e8d05104e42bcab1
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample is a PDF file flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. It contains numerous embedded URLs pointing to disposable hosting and suspicious domains, suggesting a phishing or malware distribution attempt. The 'SE_LOLBIN_RUN_COMMAND' heuristic firing indicates potential execution of commands, possibly related to downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://botokaw.ru/strik?utm_term=how+to+turn+on+bosch+silence+plus+dishwasher PDF link annotation
    • http://beremoter.online/butterball_indoor_electric_fryer_manualemic4.pdfIn PDF document text
    • https://cdn.sqhk.co/xivorotil/jiet5if/thrift_stores_in_wildwood_nj.pdfIn PDF document text
    • https://cdn.sqhk.co/bimonabozo/a9ib4w8/99021927171.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/ha3n35R/the_simpsons_tapped_out_wiki_update.pdfIn PDF document text
    • http://vclean-sale.shop/felujifulisubivapivuy3x0.pdfIn PDF document text
    • https://cdn.sqhk.co/jonawepatem/ihcgegd/fix_costume_jewelry_near_me.pdfIn PDF document text
    • http://salleapp.xyz/windows_powershell_command_helpolkew.pdfIn PDF document text
    • http://haifaiv.ru/bba_subjects_list85wd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_5fe8fefae5c36.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/mofijovelu/aicgdKE/rilorinux.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/jakufomego/HghQHjb/28958945624.pdfIn PDF document text
    • http://balifruit.com/sirobajiraminowadobarifkz8vl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417999/normal_6009f55305da5.pdfIn PDF document text
    • https://cdn.sqhk.co/bibunifez/RRdwaSm/memimiratuxot.pdfIn PDF document text
    • http://haifaiv.ru/bba_subjeIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3efba8c7-d1f3-464d-86a1-c773b564df6f/model_3_white_interior_wood_dash.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/12928711292.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/how_to_remove_hydrostatic_transmission_craftsman.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/acer_laptop_cheap_price_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f807fc-0964-4013-868e-864398129e15/xoradafitenedug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a6691ae-7b2e-45a2-90c0-ab2075f44d3f/meboxoloseze.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/bowling_shoes_buyers_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/zadegimororepij.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_off0000fc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC20 5356 bytes
SHA-256: 1d3428d9f961e99a310cc5f9d42caa6e76f5d037a12326a2c650bdcea4249f9b
font_01_sfnt_off00010e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E56 11196 bytes
SHA-256: eae1fbdae67e36fcae0f73523938e2288b7c9c81b69fca5ba6ad6fec34744d45