Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd0120d827b4237…

MALICIOUS

PDF

73.1 KB Created: 2020-11-18 14:46:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6d34a4a3d038d1970832ce3e9bda1929 SHA-1: bc8bb685bc7bc30fbc7a9b0c594faa51c5a3a9ca SHA-256: 2dd0120d827b4237eb16546b831966bd055e38cf530d438abb756e4115e255b6
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a title related to music or joy, potentially a lure. The presence of numerous external PDF links suggests a link farm or a method to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=je+suis+dans+la+joie+partition+gratu In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_5f90d7d4cf363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_5f985b4fab588.pdfIn PDF document text
    • https://ritenevibufu.weebly.com/uploads/1/3/4/6/134639535/bujetito_reketud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5f980ad3bb3a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5f94c01d14c16.pdfIn PDF document text
    • https://jowodetuleguzu.weebly.com/uploads/1/3/1/8/131856173/wolusawomezu.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
    • https://s3.amazonaws.com/vopadofugon/48939492986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f24678-c366-45e7-b9d5-b370435e7f32/libro_la_magia_del_orden_marie_kondo_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/math_games_4th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdee6797-40ef-4060-91e5-a757a96c8d72/gabepe.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/gangstar_games_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/5685484777.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/bededon.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1DF 5072 bytes
SHA-256: af62ca2380bbb385a5bf6d4d7d6c00fb2afaff3fa71f34000619816a09fdba72
font_01_sfnt_off0000c321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC321 2436 bytes
SHA-256: c40be9c38bdd1edb0e0abfd20bf783153196ef5d3b185dd59f71b0ec04dffe4a
font_02_sfnt_off0000ce07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE07 11356 bytes
SHA-256: d316964409a30d8c69b21f5fa5ecef7860603e539c0b976a27f9c26f7b56e154
font_03_sfnt_off0000f222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF222 16064 bytes
SHA-256: 378ba5569bb666bbcf62f6b10ce7b1b17e3ec70dff13df96b0486da8cd924b4e
font_04_sfnt_off000106c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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