Malicious PDF — malware analysis report

Static analysis result for SHA-256 96649c3c536b2063…

MALICIOUS

PDF

81.5 KB Created: 2021-05-17 09:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2484b2a20eaba83cc5174b9d64fb0e3f SHA-1: b19c331d756d25fdb1929bc55782b7975c633f07 SHA-256: 96649c3c536b20638bf971963afdb07f04cd38146133cf89a9a10a49f531270a
286 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing and a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 8

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://fadufavibog.weebly.com/uploads/1/3/4/8/134889314/6763955.pdf.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ponafet.ru/strik?utm_term=apc+smart+ups+2200+network+management+card+reset PDF link annotation
    • https://cdn.sqhk.co/xolizoxime/YieM7jg/gunavizazuxivowuliro.pdfIn PDF document text
    • http://mopotiboxa.iblogger.org/attached_amir_levine_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/xhijhzX/gigalife_app_for_pc.pdfIn PDF document text
    • https://fadufavibog.weebly.com/uploads/1/3/4/8/134889314/6763955.pdfIn PDF document text
    • https://niridugur.weebly.com/uploads/1/3/5/2/135296669/vetiduzibof.pdfIn PDF document text
    • https://jadowusirufire.weebly.com/uploads/1/3/2/7/132740355/1261845.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/ifeibgh/off_road_4x4_car_hill_racing.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/ji4ggic/57945908442.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/q5qigCt/archero_best_weapon_farm.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/ibR0gda/97221472176.pdfIn PDF document text
    • https://cdn.sqhk.co/migazajigum/ijvjbib/logetudaxazelozek.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/jzW3iew/free_gems_clash_royale_no_app_download.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/wazorixekunafob/naming_molecular_compounds_pogil_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/76812965399.pdfIn PDF document text
    • http://zetanurujufifis.epizy.com/aggregate_demand_and_aggregate_supply_model.pdfIn PDF document text
    • http://nasakil.rf.gd/nios_assignment_front_page_504.pdfIn PDF document text
    • http://pudunajuge.rf.gd/amoral_familism.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/save_text_file_to_html.pdfIn PDF document text
    • http://rasiritodir.rf.gd/13232334988.pdfIn PDF document text
    • http://webujexujafobe.rf.gd/bossetti_sentenza.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/12473777917.pdfIn PDF document text
    • http://fogevodazeta.epizy.com/chrome_extension_translate.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/mugipexesuga.pdfIn PDF document text
    • http://junopufobapepax.rf.gd/90440326240.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_off0000fd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD75 5780 bytes
SHA-256: bd00ee8a3611ff8c7d25f3ab0c7bfc07ccbbcb0c4ed7a88921d95646bfc797f2
font_01_sfnt_off00011123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11123 11232 bytes
SHA-256: 98346f7c8b4209093090690442ffb210f9196d28ddaf77002bef78f2948e5844