Malicious PDF — malware analysis report

Static analysis result for SHA-256 96357034213f262e…

MALICIOUS

PDF

110.2 KB Created: 2021-03-08 20:28:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b7edb5eb8f777284734fa732e31b4b68 SHA-1: 81d9998c02bbe41682012c9ed057b09af2770ad8 SHA-256: 96357034213f262e2b683298dbab8f4f53486eae23e023d010c038a65872152b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The presence of external URIs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 5

  • 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.
  • 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://vilenefex.ru/strik?utm_term=what+is+the+meaning+of+whiskey+tango+foxtrot PDF link annotation
    • https://cdn.sqhk.co/pulovafafita/fevQ4wX/37005119452.pdfIn PDF document text
    • http://uscreditinquiry.info/conceptual_physics_reading_and_study_workbook_chapter_10_answersi7r4n.pdfIn PDF document text
    • https://cdn.sqhk.co/rufetuzek/bhfVnIb/viking_gods_and_greek_gods.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403129/normal_5fe531858f72c.pdfIn PDF document text
    • https://cdn.sqhk.co/sovajepuxe/iaTje5Y/who_dies_in_endgame_avengers.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/67637129761ygn2o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469860/normal_60465b4ba101c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403804/normal_5fdbe589a8f63.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/bajiegj/new_english_songs_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/2sH0hbq/bubble_boy_seinfeld_cast.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_ca7060e01b4748f39ef85736ef3179fa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a6216a3-00aa-48fa-9186-2aaa21c9518c/mayan_numbers_to_1000.pdfIn PDF document text
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_3fe396c52ed54ae99050ce899c3ed27c.pdf?index=trueIn PDF document text
    • https://5e20aa6b-77ef-4f11-9344-5454fb7c649c.filesusr.com/ugd/fb3aa9_e75e464fc4cb42c8971b455c0fa6952d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/columbia_river_shad_fishing_report.pdfIn PDF document text
    • https://8ca15cf9-c5bf-4329-906a-32df3c7b5ab7.filesusr.com/ugd/4ca7f5_d5e9eab48a1146d0907f88a89fafef8c.pdf?index=trueIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_346748bbd7f740369cdb5043cbcb75a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/92077621455.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/water_scarcity_in_egypt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/164b14ca-080e-4f50-9b15-989b62ba8bb2/rugivapagefagejezol.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/wetiduv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13243bc5-9c92-4313-a35c-7f991c7c8202/jokowonikanix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dbfdee3-277c-4a6f-861a-c7f251e9837b/warhammer_40k_book_mega.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off00017063.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17063 18176 bytes
SHA-256: e43eb858545a4d9b6abacc8c33ec9501d2ae64a4dc3cc092ef357486bb4e7a32
font_00_sfnt_off0000f4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A3 5684 bytes
SHA-256: caeed39893b82969c26dfcac95946a3fad4fbae0765b3ea81aa15456cfe783a6
font_01_sfnt_off0001087e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087E 5276 bytes
SHA-256: f295338863988c96485cc91cad8310cdbb3b5b53f709ffe0c093d33ac4a30a72
font_02_sfnt_off00011a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A60 2328 bytes
SHA-256: 6d897259d7ab9db79b0dbb16904cd99ff486aa7f4a475590a5d3e44eab6e0eed
font_03_sfnt_off00012516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12516 2108 bytes
SHA-256: b3976ad28991401f3a7e0d936621f3963ed8fd81aff5bedc9e25cf6548b1959b
font_04_sfnt_off00012ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE1 6640 bytes
SHA-256: c8cb303e765c67f43d6d34f29c1d02953890772ff7b697be779fb29335000f72
font_05_sfnt_off00014080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14080 15524 bytes
SHA-256: 2e410ef68a284b17fb7d675c8abed6a1bd6f4d2cd31c061e4e0b178a16e21ce8
font_07_sfnt_off00018cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CF3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
font_08_sfnt_off00019af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AF3 3276 bytes
SHA-256: 333cf0bae5291019b79d77a37696b89786718dc77a0e6f1c7356514a48765311

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