Malicious PDF — malware analysis report

Static analysis result for SHA-256 50e577b1d1618138…

MALICIOUS

PDF

83.2 KB Created: 2021-03-14 08:08:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 72cd6072c6cfd90501ed81523d0b21ed SHA-1: f1b7a644fb9900adcf8a82aab31a5d7a8400d3f5 SHA-256: 50e577b1d1618138671dfe206c81198093655d539ebf32792dacf2ebf4f09f78
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body suggests a lure related to an 'Sbar template example', directing users to a suspicious URL. The presence of external URIs and link farm characteristics further support a phishing or malicious redirection 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://midufefew.ru/wix?keyword=sbar+template+example PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462351/normal_603eb221306b9.pdfIn PDF document text
    • http://muzidos.iblogger.org/basketball_drills_to_improve_ball_handling.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468530/normal_60226c0d22851.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369783/normal_5fed1daf14f2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389604/normal_6044598aae23e.pdfIn PDF document text
    • http://jimubezisu.iblogger.org/89587360354.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fonumorawupako.epizy.com/trauma_abdominal_cerrado_pediatria.pdfIn PDF document text
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_bb6d7bfe6113422fb4ab4e2fc626a7b7.pdf?index=trueIn PDF document text
    • https://e57d8632-f742-4524-ada6-9cdf759d9f13.filesusr.com/ugd/b0cb2d_69f69b158a12488c91fe0af4bc859d43.pdf?index=trueIn PDF document text
    • http://valigajemebid.rf.gd/spring_boot_tutorial_for_beginners.pdfIn PDF document text
    • https://77abcf6a-1f47-4233-a5f7-28832101be0a.filesusr.com/ugd/e29e5c_3b9a59b0b8034571b9e7db6a691cf619.pdf?index=trueIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_9a6c875345fb4ba097b5dd5b35127e04.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/analytic_geometry_ellipse_problems_with_solution.pdfIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_4f7c2cb8f9184396b368f49a97e21ef8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/timituvupame/12071825909.pdfIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_c6d4e8423b79496ea41f250fff8e6fe0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vexeliku/binondo_food_map.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/anticipation_secret_garden_sheet_music.pdfIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_512c32e8c8c34816808f0270f49b938b.pdf?index=trueIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_857946413ec84a34867f9952ed8db5c8.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA1 4624 bytes
SHA-256: dce7b1ccab0a8c3e0527714cb5a3bad0fa51a2de7373685601207e2f0d971f24
font_01_sfnt_off00010c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4C 10868 bytes
SHA-256: 81cc17de48968a36de6dcdc6a8c280e8bba7e8b291ef4b700419b072ef381742
font_02_sfnt_off00013162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13162 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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