Malicious PDF — malware analysis report

Static analysis result for SHA-256 912af269e7b35f41…

MALICIOUS

PDF

89.1 KB Created: 2021-04-10 22:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7890f6254d3fa49ec32dada95742cbf1 SHA-1: dd0061afc8b7e3cba39075332b85bf0f9c7f1507 SHA-256: 912af269e7b35f41fcb03d4f035db5e176acc2986259cdec20f71d5132825211
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, characteristic of a link farm, designed to obscure the ultimate malicious destination. One of the primary external URIs observed is 'https://vilenefex.ru/strik?utm_term=harry+potter+characters+now+2019', which is likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://vilenefex.ru/strik?utm_term=harry+potter+characters+now+2019 PDF link annotation
    • https://cdn.sqhk.co/xibetevoxaj/jhdij5W/91990295936.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445888/normal_60080c1b9076d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_60443ccac98e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457561/normal_5fcb25f9f2fcd.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/jhielOJ/10842508696.pdfIn PDF document text
    • https://cdn.sqhk.co/nemisova/hVzwcgg/alight_motion_mod_apk_2._4._1.pdfIn PDF document text
    • https://cdn.sqhk.co/kejalupegem/4hdjaje/video_watermark_remover_free_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/remeranexe/borapovisegekev.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/marketing_strategy_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/american_born_chinese_book_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/badminton_skills.pdfIn PDF document text
    • https://4fbc56e1-d9a2-4996-be1d-38f9cd263936.filesusr.com/ugd/b1afee_0378b0ccd6a44ad2b558ab29426b6979.pdf?index=trueIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_aad69f8d850f452aaa313b72e679d1cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/the_power_to_get_wealth_kjv.pdfIn PDF document text
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_2d57b704cf5e4cef9ccac2a53c663567.pdf?index=trueIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_15c6c0cb7480411087f74e6da6be2513.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/51016759419.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/d_d_beyond_character_sheet_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/fezikafi.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/68876403992.pdfIn PDF document text
    • https://4edd92ed-4e96-4c3d-a837-a16c7246ae9e.filesusr.com/ugd/7c3149_9af2fdc336d948259c8f2d5f0463548b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/3989544957.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00013af7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13AF7 17772 bytes
SHA-256: 2904c1c98c731880793f07b06f995f2736a815a9e03744059e72175f41db8127
font_00_sfnt_off00010225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10225 5628 bytes
SHA-256: e846c74a78f63225ab0b22a8cacaef3605240f84b704821214cd6ba1572a74f9
font_01_sfnt_off0001155c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155C 10996 bytes
SHA-256: 57d3cf4214097582113e97f6b049d984e16d4cdd6e22e316e8b6e40177e7ea08

Open this report in the interactive analyzer, or submit your own file for analysis.