Malicious PDF — malware analysis report

Static analysis result for SHA-256 326dbbb4c00fa7f6…

MALICIOUS

PDF

76.0 KB Created: 2021-03-31 13:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f33eca8fa0f46eefc4bc2e028b01d32 SHA-1: 762d916c9d137e4f65df9c98fe6b6ebeacd12a87 SHA-256: 326dbbb4c00fa7f688de26873d7816e5351900c71f9e7704e2ec8783992ea253
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of embedded external links, with one primary URL pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to "livestock waste management pdf", likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/award?keyword=livestock+waste+management+pdf
    • http://namafafiteg.mypressonline.com/cute_may_2020_calendar.pdf
    • http://pakirekugep.scienceontheweb.net/12651341737.pdf
    • http://stakingyfi.com/268560348861fb12.pdf
    • http://getchambre.xyz/behen_hogi_teri_movie_480p1by0q.pdf
    • http://sokuzise.iblogger.org/monkey_quest_rewritten_download.pdf
    • http://maxovulosaxa.22web.org/what_is_the_best_dishwasher_detergent_for_a_bosch.pdf
    • http://olivamebel.com/unix_shell_scripting_books_for_beginnersfzxyp.pdf
    • http://idealsit.fun/another_word_for_stressed_out_behaviorb3se0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_a357b10d6da9400f9e2cb0ddc50df73d.pdf?index=true
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_dd73bdd4e2f34b94b65294bef0611b64.pdf?index=true
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_10b36db6497f4f21bf4bb57a865bb337.pdf?index=true
    • https://73099f28-10d5-4558-98a1-2f8dc61f1a2f.filesusr.com/ugd/f62eaa_36f18ef5516c4d17b4d551cac169a682.pdf?index=true
    • https://uploads.strikinglycdn.com/files/67276b54-fc97-4d26-a2e7-e25159e06aba/jolapisixexoxipuvele.pdf
    • https://uploads.strikinglycdn.com/files/2417302a-093c-41de-8eaa-2a7271c46df6/1996_polaris_sportsman_400_carburetor_adjustment.pdf
    • https://uploads.strikinglycdn.com/files/e665ff26-eaed-4520-a823-9cc5cc038ff2/how_to_use_meade_infinity_50_telescope.pdf
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_1f1cf3c9e9bf4db49f71e83f8244970b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f33aeffa-d32d-4333-a225-d4060d326b50/80704220769.pdf
    • http://puvapulugo.onlinewebshop.net/51928781922.pdf
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_c59e2466185a4666a417613e0ed36adf.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3c1c6edf-ec47-40c5-af48-2b5e750a0cbd/what_are_the_types_of_brain_teasers.pdf
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_c0436fdc99e44f73bc5c7da7bd0eba4f.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e96a.bin
1dc08cf1f31bb57dd4e529d11bb2ac326c7dba4275913abe6a04205c76ccce1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE96A 5504 bytes
font_01_sfnt_off0000fc3e.bin
4b937aaa9bdf2b0b85677d07f4c85bbe2b19e83ce6c8774c79ba9313fbb7bf6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3E 11396 bytes

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