Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf7f1d9b8a4085a…

MALICIOUS

PDF

90.9 KB Created: 2021-05-17 07:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a17281b782fad189e37bb11ccb70ee00 SHA-1: 9ef4aa6ced993c75a455a70abb3c2e0f4283f81e SHA-256: faf7f1d9b8a4085a1d93bf4729df116c55c52a19696d031ef7f941e772048c23
104 Risk Score

Malware Insights

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

The PDF contains a malicious URL that is presented as a download link for a textbook solution manual. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is likely intended to download a second-stage payload, aligning with common phishing and malware delivery techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=advanced+engineering+mathematics+5th+edition+solutions+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486190/normal_6062052a09fff.pdfIn PDF document text
    • https://cdn.sqhk.co/bemapebe/Mqjehjc/.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/jedU8gf/fanikewujisisubajoxuxi.pdfIn PDF document text
    • https://cdn.sqhk.co/kidimezamos/YIjbpha/11694241926.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393641/normal_5fca6dbfa1c9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458132/normal_6040bba09c98e.pdfIn PDF document text
    • https://cdn.sqhk.co/noxuwitide/WgjjKia/metenogovokomit.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/dhfdQjj/10483312662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392868/normal_601d96812ba88.pdfIn PDF document text
    • https://cdn.sqhk.co/forinabam/exIMehh/cytus_ii_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/gigcicK/pokeball_plus_sword_and_shield_new.pdfIn PDF document text
    • https://cdn.sqhk.co/neratimo/KQcicge/9651998168.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://uploads.strikinglycdn.com/files/f780e286-f5bf-4edd-ba26-f85ce1f3487d/93937213820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/896d94f7-f127-4749-a514-338ec3e33290/what_is_a_dappled_horse_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d21a93ae-9ae4-4477-ba88-23f975eca331/jipexivuwawajavejip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3965cea8-5151-4baf-b699-0fb9418c9155/friedrich_nietzsche_on_the_genealogy_of_morals.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/47538686994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e308376e-3b5d-44c9-a2eb-62b032355c2b/sefoduxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/219fec93-d4e5-4c86-b5a2-db3c721eaa96/how_to_find_the_best_deals_on_black_friday.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2680fd76-af61-4ef9-8d38-7ed6120aa4d1/kexubodegunewikixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f94ba43-bf47-464a-8517-8c482bb4d49c/lujirevevowoxedaka.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/jigotodesoreratutetaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9336f70c-4592-4edf-a8dd-a9b56d246b2e/how_to_solve_a_rubiks_cube_in_3_moves_from_any_position.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8358050d-fb5b-43e9-acfb-8159be683211/samsung_mu7000_49_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/2015853594.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCED 5624 bytes
SHA-256: a45964157cd087ce9b370b5d0d8ed78c4213b100af89ac85d33633d94ef572fc
font_01_sfnt_off00010fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEA 12792 bytes
SHA-256: 4e06ec9dda29b432fa27a056845a087c5e07ef224069f5dbd583033e356fcacd
font_02_sfnt_off00013995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13995 16148 bytes
SHA-256: d64777a7d65be8b4ff3a01fb6dc8605daf54527c13afd64b593f36d2fbe3c913
font_03_sfnt_off00014e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E82 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34