Malicious PDF — malware analysis report

Static analysis result for SHA-256 11795afaacd324b4…

MALICIOUS

PDF

75.9 KB Created: 2021-03-17 04:05:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 54093274554e7e6281f669ff2df6ca6c SHA-1: 9c41ef85ce96e26e019186677c13b62b89f39644 SHA-256: 11795afaacd324b4da31b3734fb7e72d76ee6b368612c50ed1ab9319c7f0d67b
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 presence of numerous external URIs, many hosted on disposable domains and configured as a link farm, suggests a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to driver downloads, a common lure for users seeking specific software.

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://golowaki.ru/strik?utm_term=asus+p7p55d-e+lx+sound+drivers PDF link annotation
    • http://badgesverified.com/is_peds_hard_in_nursing_schoolw0kbt.pdfIn PDF document text
    • http://moitender.org/chowan_river_fishing_report_201876rr7.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/Giaieii/george_strait_new_album_2019_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/govamopega/WicMjh9/swat_team_salary_nj.pdfIn PDF document text
    • http://domensita.fun/a_christmas_prince_streamingpby7t.pdfIn PDF document text
    • http://abwaab.su/25831014823oh744.pdfIn PDF document text
    • https://cdn.sqhk.co/metajewamiva/gcyjeia/bunikeleda.pdfIn PDF document text
    • http://callup.today/hindi_grammar_worksheets_with_answers_for_grade_5cdgsn.pdfIn PDF document text
    • http://dihtyar.online/harrisons_internal_medicinez241m.pdfIn PDF document text
    • https://cdn.sqhk.co/selodiro/OJFtgcQ/80779353761.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/hjcfAhi/88492923545.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/suzixegazunow/another_me_2014_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab1d73c-b0d0-4965-a4b9-ea97fa403b9a/tawisaderovebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab9e1b18-535a-4f0b-b558-abac0d525425/convert_garageband_files_to_mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/050f45b7-eb74-42b3-831d-ebb0c53f7be6/boy_scout_eagle_required_merit_badge_list.pdfIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_21b387945a65442ba7626efba067627d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/607ba5e7-84a6-4a5b-95be-640b3d7469f6/reasons_why_not_everyone_should_get_a_trophy.pdfIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_52d7092c14334e83b582aa19792eb772.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pezofut/beach_head_2002_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/juliette_gordon_low_coloring_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd99950-ad16-43f0-bb0e-73a8517fc7b4/72500300122.pdfIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_6957053b021a426db10a9e7e1e429927.pdf?index=trueIn 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_off0000eccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCD 5096 bytes
SHA-256: 119c8ea896f7a000795cfb8d142d3561df8c3ae1381d6c4c7d8a56e0bbfaead4
font_01_sfnt_off0000fe52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE52 10572 bytes
SHA-256: c07296a5bfd4d02838a9bfe3377535cfc7ca11bb0aace4fad29064c9b46230cb

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