Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa27d94aacc5335d…

MALICIOUS

PDF

79.6 KB Created: 2021-05-01 23:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 32313ef8d8d07b20bc59ca7650099ef6 SHA-1: decc30389c7551bad2670a3a60c7be7fa87093dd SHA-256: fa27d94aacc5335d0c2f1c9763945ce88e0f8b221f8490a7a75e8d9610ced295
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. 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 0.9990

Heuristics 4

  • 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://fokemale.ru/strik?utm_term=mediterranean+diet+meal+plan+for+weight+loss+uk PDF link annotation
    • http://pasetbs.xyz/all_skillz_games_for_androida1xoj.pdfIn PDF document text
    • http://ryukzak.digital/jesitetizenublt8.pdfIn PDF document text
    • http://chambreop.xyz/the_princess_and_the_pea_full_story3ak3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379719/normal_5feb4bfa4dd54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394062/normal_604dada1f0035.pdfIn PDF document text
    • http://braco.ru/how_to_light_lennox_furnace_pilotfq9nj.pdfIn PDF document text
    • http://amorexpo.com/entry_level_software_development_jobs_houston3uff4.pdfIn PDF document text
    • http://telgrm.site/zorikidoru5qa2q.pdfIn PDF document text
    • http://bahis-sikayet.com/c_function_reference_pointeruag2n.pdfIn PDF document text
    • http://thesimplycompleteseries.com/non_steam_games_freehg3vu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470029/normal_6000addd1d94e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408352/normal_6062c12334fab.pdfIn PDF document text
    • http://biomanua.website/39131654654w6xz0.pdfIn PDF document text
    • http://bigowet.xyz/492106692k2xyg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cdf1307-03cb-4086-929a-352ed360f6e2/zajitatu.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/jaxugametudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21308adc-3916-44da-8125-a9ab431162c0/interpreting_line_graphs_worksheet_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9d32c58-55e6-48be-b6eb-ddb520210c15/26698477559.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/vigotos.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/kepuvawitelasuzug.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/21575404317.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/jipal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f86db8f0-3532-45ab-8450-3d31bb445ae6/nawuxoju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccd0a729-e4c0-4fbd-85c0-48277867e0f4/fovosa.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/34028252709.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD6 3272 bytes
SHA-256: 56d8b0a51103e328f01f6e2cdd30fd1e8233b5a4bbcc76a8049c6fdaac39d60b
font_01_sfnt_off0000f779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF779 5616 bytes
SHA-256: 95b8a3429741a74b545e7bb427da77669a5af1b59fdfd4be75c013e756cc1029
font_02_sfnt_off00010a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8C 11044 bytes
SHA-256: 47753381892e69b218ec99d3a56dbf2fb5d63dd578a530ea153c6436d7be6490

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