Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d38d789d5f97da…

MALICIOUS

PDF

80.4 KB Created: 2021-04-01 20:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 65c75d5f43f09bddb63a68e5f76a1518 SHA-1: 8bb75ba63a0f61a6170ea5ab69fecd935e459c25 SHA-256: e2d38d789d5f97da0915c5adf2fae437e754b3af73fd2e010a62760eca79c777
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=the+secret+life+of+walter+mitty+short+story+sparknotes PDF link annotation
    • https://cdn.sqhk.co/tifobebe/he0gfyq/sword_and_shield_set_list_price.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/ohcxieZ/movies_2020_out_now.pdfIn PDF document text
    • http://milktree.store/gamegawemufotenyo590.pdfIn PDF document text
    • https://cdn.sqhk.co/gozawelesutu/bjejaij/new_nhl_schedule_released.pdfIn PDF document text
    • http://manatisuga.22web.org/mudebebupaxabanilefadel.pdfIn PDF document text
    • http://prazdnikprosto.ru/macy_s_at_pentagon_city_mall_addressizo6q.pdfIn PDF document text
    • http://dihtyar.online/does_the_rainbow_air_purifier_work8erlq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_2584dac064db4ac0bfea3695ab16df56.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db1387b2-fcb6-4d9d-a595-f040cb6f1874/metroid_prime_4_trailer_2020.pdfIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_76d3f46d8f0a4adbae33671314e59e65.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/jorowijufarudo.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/2082453918.pdfIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_770f670bd9604f88b0c6448edef173be.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a170d0fb-4ff2-4dbf-9ed2-44e234a9e92d/46252844924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/397ee18b-07aa-4e83-a32b-cb047b2d2144/66273085880.pdfIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_860832a510ba4945a89828b62d2580bb.pdf?index=trueIn PDF document text
    • http://losoxapo.epizy.com/black_and_decker_scumbuster_battery_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/11646029000.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/how_to_repair_jetted_bathtub.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/milodezotapomawaladi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95D 5464 bytes
SHA-256: 5b38b2c68ac7affcd1ab0b6b73b89d115695684e842fb7e9483d661940cd79f2
font_01_sfnt_off00010be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE3 11052 bytes
SHA-256: fa666f917dc94837da4803fcd6615d6ee33eb5f6b916721ce5b105336d435d19

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