Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b42bdf2660580c…

MALICIOUS

PDF

76.3 KB Created: 2021-03-28 01:37:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11942a3b26b90a826d8f0b40911fee45 SHA-1: 008cc282280e19de742b73acfc92ea1d9e2511b0 SHA-256: e0b42bdf2660580c7bd6e0fb230f4c67eb91d561366b463196ff0ff8bf351e76
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL that appears to be part of a link farm designed to manipulate search engine results. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of many external links suggests the document's primary purpose is to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/award?keyword=4+week+workout+plan+to+get+ripped+pdf
    • https://static.s123-cdn-static.com/uploads/4403674/normal_5ff40639bf47d.pdf
    • https://cdn.sqhk.co/turaxulefa/icib5jg/rusomem.pdf
    • https://cdn-cms.f-static.net/uploads/4492573/normal_602a090393d5a.pdf
    • https://cdn.sqhk.co/resilano/hgidfgc/racing_in_kansas_city.pdf
    • https://cdn-cms.f-static.net/uploads/4480187/normal_6040b6b5ee0b7.pdf
    • https://cdn-cms.f-static.net/uploads/4424692/normal_6037649fef15c.pdf
    • https://cdn.sqhk.co/bepoweruga/ifghM0k/threads_pour_instagram_apk.pdf
    • https://cdn.sqhk.co/josipinu/hifggij/gladiator_rising_2_mod.pdf
    • https://cdn.sqhk.co/dapumexader/hjjfgfa/mezisitezorafe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_805588b6a55e4c9dbe6e119256adeb73.pdf?index=true
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_63e4953c0a114665b1f62fe30ad4b0b2.pdf?index=true
    • https://s3.amazonaws.com/widofafane/what_is_the_role_of_public_relations_in_integrated_marketing_communications.pdf
    • https://uploads.strikinglycdn.com/files/b28de116-f4e9-4036-bd8b-a67969dda55f/30101883165.pdf
    • https://8d275f60-8e36-4e70-8574-b6d542a617c4.filesusr.com/ugd/dbf6c2_fab05c714aeb49c1ba940e9429be99fb.pdf?index=true
    • https://s3.amazonaws.com/topipovikapari/ginakaxuvuwobedekejif.pdf
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_016b153a7bae41548fc628ce7946278c.pdf?index=true
    • https://s3.amazonaws.com/meludav/3858935496.pdf
    • https://s3.amazonaws.com/tobaziw/lesson_master_b_answers_algebra_2.pdf
    • https://s3.amazonaws.com/tajimipojimo/bafewufixekisiv.pdf
    • https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_09df60e19bba4a6889faf85ff4ee2dea.pdf?index=true
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_b3009285b9864965a2306c11f6539c70.pdf?index=true
    • https://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_2f6255f06c074bbc9d760f5721a69657.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9b655f43-0a36-4dd5-8fd0-0b7a3ee41c04/sat_subject_tests_math_2_practice_test.pdf
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_c71feb53a9544cf594d914f25b053299.pdf?index=true
    • https://uploads.strikinglycdn.com/files/887fb169-f033-4e68-87d6-3c6c63fd8b62/percy_jackson_and_the_olympians_book_2_audiobook.pdf
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_a986ba9401024863b8ce2691eaf36550.pdf?index=true
    • http://www.w3.org
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f534.bin
326d59e0b17470367dab42ee267a6775409a852d686736a4f5037d7d4a9a9948		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF534 5180 bytes
font_01_sfnt_off00010702.bin
534ea3369b4e4021c68c5034f0cb165d74a06446132620ceb63e1657e10a4159		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10702 10264 bytes

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