Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0aabd46c8a603cd…

MALICIOUS

PDF

78.0 KB Created: 2021-03-22 02:24:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 745a1f3d6474b09ed968fc138eff50e6 SHA-1: 5610b67e082f93bd3198c7ac7a87367d35fe9524 SHA-256: d0aabd46c8a603cd196b2beba76561ccd5efd335615ad5b2582fbfbbb3f7042e
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm and an embedded URI pointing to 'dafemum.ru'. This suggests the document is designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/award?keyword=career+path+law+book+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dd83ea09-9795-4c07-aaea-ccee84f45e26/is_adjustable_base_worth_it.pdf
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_06eec18279a94c138b8c08f7654f81d4.pdf?index=true
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_a452e548d0174083b829fe821e36eb05.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0a536684-6f10-41eb-8a01-370cd519a19d/3958666467.pdf
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_438be695275a46cf9b10a8dd5581ee0f.pdf?index=true
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_f895eb5d6d854e9bbf327a90a172a0fa.pdf?index=true
    • https://uploads.strikinglycdn.com/files/95046335-6b06-4117-8c11-98e68d8daccb/sat_math_tips_and_tricks.pdf
    • https://2bb9e989-9ce9-409f-aa8a-839f2ea8d3bf.filesusr.com/ugd/9f8cc2_f549d2cca9f543f79d149465b8a7aa4b.pdf?index=true
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_0044ed43c87743b7813a40113ae5f250.pdf?index=true
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_19f5b98474ee49fa9a6e35fa350b1874.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2dd0033d-d27f-4f7f-9f96-6196c73667df/lg_g2_market_price_bangladesh.pdf
    • https://uploads.strikinglycdn.com/files/49107b8d-46fd-41a2-8060-abfc26102002/ti_nspire_cx_ii.pdf
    • https://uploads.strikinglycdn.com/files/aa348e09-c817-4ee5-bbf4-9e9d1398f567/97266889695.pdf
    • https://uploads.strikinglycdn.com/files/cb47c5ac-e453-48ff-b34c-384cfa2be9b3/are_ge_top_load_washers_good.pdf
    • https://uploads.strikinglycdn.com/files/50c1f9e6-7081-41af-b43d-815390dd8e57/la_divina_comedia_de_dante_alighieri_genero_literario.pdf
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_26e13773e91a4166b094d12c922f8a97.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2e1bc336-4866-4858-836f-59a268007f43/ligotiviruxeje.pdf
    • https://uploads.strikinglycdn.com/files/6314d6eb-bcf4-436c-8716-ffb4c2ae9509/las_edades_de_lulu_libro_opiniones.pdf
    • https://cc6d8859-fc08-4100-a073-55b48c5addfc.filesusr.com/ugd/238140_9af0b403ded24c3fb0ec97afeb28cb4f.pdf?index=true
    • https://7e574f8b-ef34-4833-8dee-b18f3ac9fc91.filesusr.com/ugd/af8ffd_efc7ab6fd5254b0d82c4195ab75b30cb.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_off0000f4f1.bin
d8f3ae0f43159962e55a91d791226bf4957e5f15f7d79f9861a69540b40a4117		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F1 5152 bytes
font_01_sfnt_off0001067f.bin
969cd7503a50e995a474812cf3a96e3ad1134c6c4cf2bb160ceaa57816533bef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1067F 10584 bytes

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