Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e8c17e59465d63d…

MALICIOUS

PDF

85.4 KB Created: 2021-03-18 11:32:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7455ef184b1ab03aaeb8f160264460e SHA-1: 4929802b4dea4b92adb1883bc0b82f4de024412e SHA-256: 3e8c17e59465d63dd6bacacae8be292539fb9d90a56c402053bc4c78c2b2144b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to 'mezovuduw.ru' and labeled as a potential phishing or malware distribution site. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search results or distribute content. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/award?keyword=curso+base+de+dados+pdf
    • https://mofutobanu.weebly.com/uploads/1/3/1/3/131383854/garudakobid.pdf
    • https://cdn.sqhk.co/rebabafa/25ALjiX/gardenscapes_2_online_gratis_espanol.pdf
    • https://cdn.sqhk.co/bipozipo/nhfLUjd/furidashi_drift_cyber_sport_pc_gameplay.pdf
    • https://cdn.sqhk.co/xorilulog/jXRhghj/31056899361.pdf
    • https://kakowafalajoji.weebly.com/uploads/1/3/4/4/134455686/2261994.pdf
    • http://ellmax-site.xyz/whitetail_deer_antler_scoring_sheetunvf6.pdf
    • https://jurozujuzofu.weebly.com/uploads/1/3/4/8/134875655/1957169.pdf
    • http://buylettersonline.com/hill_rom_bed_weight_capacity7j0at.pdf
    • http://2220202.ru/40624557195sdy0h.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_bcda054d57b64daf9faf727a17a47a1d.pdf?index=true
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_20758d76dae74c218b5223abad7644d9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/da7ce1a6-0a64-4191-9671-fab8270af054/nefagawanumimu.pdf
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_565c7e94a7154e8bbd78b665b826fc65.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a3e8aa7d-a0df-4ae7-ab31-23c4f954aafe/vifukezokomekesuwa.pdf
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_7e3a1d5fcc364af7a745f657070d081c.pdf?index=true
    • https://e510c2d5-567e-4a96-89ff-abc18316baf7.filesusr.com/ugd/8a9bcc_92fb34460e7042eab3f81d918a10fcbb.pdf?index=true
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_bf546876042a41dbb840067e04343dcb.pdf?index=true
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_d588f686c01e4d66974a3ea45ea31c0c.pdf?index=true
    • https://f8b57e9d-e272-4783-b6f5-6420e6b93425.filesusr.com/ugd/886b73_6cfaed0ecb004792ac513cf97763938c.pdf?index=true
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_a4a5a749b521438582f56763c08f56fe.pdf?index=true
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_e7da90434e3b45b69728b0accd6d6500.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_off00010c97.bin
10089c1436e8d36dcac287c4dfa238589269c9ee3ebef7ae706db779e77e3410		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C97 5048 bytes
font_01_sfnt_off00011dc5.bin
d8e62270d2f1bed2720bd7c14eb99bd31c66d1eabd2042dbba3b0683bac9a41a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC5 13224 bytes

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