Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf222197b0339145…

MALICIOUS

PDF

82.5 KB Created: 2021-05-01 17:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e160c4081ae61867f881cac62495573 SHA-1: ab50048436e8646795589f58333608ebea06b09b SHA-256: bf222197b0339145e2264220e9692322d0786f9f80b720397daf2c4a5719433c
134 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains references to 'Dell latitude e6430 drivers' and 'free download', aligning with a phishing lure. The presence of external URIs and a link farm heuristic further suggests malicious intent, likely to redirect users to download malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/strik?utm_term=dell+latitude+e6430+drivers+windows+7+32+bit+free+download
    • http://fakixigulidol.mywebcommunity.org/98389890006.pdf
    • https://wanowozuvigamo.weebly.com/uploads/1/3/0/7/130738859/timeniwob_xefezi.pdf
    • https://cdn.sqhk.co/nejijilo/ggznhgQ/xavemolowosobesarazi.pdf
    • https://vonebofakakare.weebly.com/uploads/1/3/1/8/131856314/c5852c135083c00.pdf
    • http://pazadixokumox.sportsontheweb.net/40074497298.pdf
    • http://bamirajewenexo.medianewsonline.com/31222713986.pdf
    • https://cdn.sqhk.co/devuzemalut/hfqghiZ/space_shuttle_program_disasters.pdf
    • https://cdn.sqhk.co/dofowaduz/Uxhbhej/scruffy_white_dog_names.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vitelitubovuluj/piwisenodilatoxifona.pdf
    • http://wozitoso.atwebpages.com/77868287630.pdf
    • https://uploads.strikinglycdn.com/files/a84080f0-5288-42da-85cc-49f4373f8b47/the_very_smart_pea_and_the_princess_to_be_read_aloud.pdf
    • https://uploads.strikinglycdn.com/files/682de906-7163-4241-8457-d96523f41e5a/war_of_the_lance_5e.pdf
    • http://xizokenimufewom.atwebpages.com/journey_to_the_west_conquering_the_demons_full_movie_in_hindi_dubbed_download_filmywap.pdf
    • http://velelakolifuvu.onlinewebshop.net/29043428454.pdf
    • https://s3.amazonaws.com/gixirojozogufux/4504675828.pdf
    • http://bidajalej.onlinewebshop.net/40596999851.pdf
    • https://s3.amazonaws.com/timeziso/motorola_xpr_3500e_range.pdf
    • https://s3.amazonaws.com/jukezeluf/fishing_report_north_texas.pdf
    • https://s3.amazonaws.com/zategafozasiru/discussion_lab_report_microscope.pdf
    • https://uploads.strikinglycdn.com/files/6011f3bf-1240-4c6e-8d8c-69f60e673fcc/how_to_calculate_lattice_energy_of_an_ionic_compound.pdf
    • https://uploads.strikinglycdn.com/files/c7a67112-1fa6-4bfb-85f5-037782c18931/timex_expedition_watch_indiglo_not_working.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f41f.bin
6f0cd9ce1e3b1233baeafe1bb84509d4ced9cd7ca249ad697ed90406fb3c80b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF41F 5836 bytes
font_01_sfnt_off00010824.bin
c9ff60223c3fa46f04b24efa463de35780aa901ccfb46d74fb3349331fcd460a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10824 11200 bytes
font_02_sfnt_off00012e0f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0F 4324 bytes

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