Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eef40242b03d967…

MALICIOUS

PDF

78.4 KB Created: 2021-03-21 00:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8c48398c74ea215e5eeb9449e6cce5fe SHA-1: 7908f04dcc5f04cb1e8710895d27cb5bfb9715e3 SHA-256: 9eef40242b03d96752ba0b6f274b4a5062bc3d63383291d5003082646c0635a4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

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://maypoin.ru/award?keyword=il+y+a+c+est+exercices+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368752/normal_6032c082d7927.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444366/normal_5fe162469c732.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370768/normal_6008137d89f5a.pdfIn PDF document text
    • http://silver35.ru/nenusocpw10.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/dream_story_arthur_schnitzler_audiobookafixu.pdfIn PDF document text
    • http://basiditdcf.space/percy_jackson_sea_of_monsters_trailer_in_hindiezeul.pdfIn PDF document text
    • http://giocodigital.space/leadership_bshhkh9.pdfIn PDF document text
    • http://doorstepcomputers.com/75743443013v5rq0.pdfIn PDF document text
    • http://evatopshop.xyz/2020_my_country_cheats_windows_10qxek3.pdfIn PDF document text
    • http://pmaider.com/google_what_does_jelly_bean_meanket1l.pdfIn PDF document text
    • http://bio-ita.fun/360_degree_leadership_assessment_free5m9a1.pdfIn PDF document text
    • http://expo-kit.ru/13344806895tcu7s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_601469deac9b4.pdfIn PDF document text
    • http://50offshop.pro/fonevufipupakrnlz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a1dc35cb-f37e-4ef6-b6d7-1949b8ea0206/tenergy_battery_charger_instructions.pdfIn PDF document text
    • https://12350a4d-732a-4148-85a7-4fa27f2a77ec.filesusr.com/ugd/17beed_a850fc99063d4c6fb03bf9e888fb5966.pdf?index=trueIn PDF document text
    • https://d8d691c7-cf48-432b-bece-a54604b57851.filesusr.com/ugd/1e3a4b_fbf68fc45df044fe90db43d2f24e999f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6091e778-56e1-4346-b909-54879af5e90a/how_to_make_a_monster_truck_valentines_day_box.pdfIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_7bc319a61d834896b6553204c54fe56d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/996a5ddc-c307-419d-8760-4ea40a962b55/prince_of_persia_full_movie_download_filmyzilla.pdfIn PDF document text
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_7f0ef162187a4a40a76b0685561e57c1.pdf?index=trueIn PDF document text
    • https://6a9ecc2b-05c3-4056-8705-773ae6be8cdd.filesusr.com/ugd/7a359d_76a7ae543ffe48d0a06f140df9871209.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE373 4828 bytes
SHA-256: ed00329319856e3535a08c296e28ce442f1b3295dc47e984a00cae3867e461d0
font_01_sfnt_off0000f3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F3 12796 bytes
SHA-256: 19e3f94a0f360f6f771ee5a7aa6e806715fbc7feef97fd4a1bac23b93ad417ce
font_02_sfnt_off00011c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C74 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f