Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b85fbf9d3ed526a…

MALICIOUS

PDF

95.1 KB Created: 2021-07-05 06:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1e73b99f934a606477aa010382b98fb4 SHA-1: fd0844cfaad920fec80408a9ad30bcf340713c86 SHA-256: 2b85fbf9d3ed526a787bdf7a3cd9f06b2ad8344b2a6c1588f50486d347ed4485
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically those pointing to PDF files hosted on various domains, suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF_URI heuristic indicates an attempt to redirect the user to external content, likely malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a208c288873---kijovejona.pdf
    • https://agatanorek.com/files/file/56633634266.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070817431fab---61440934621.pdf
    • http://verduciautodemolizioni.it/userfiles/file/8203636430.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/3d57ad27fb1d459907899f2e69094fd8/fikogovemesixoguwejej.pdf
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/xopujopepipewurero.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/2b01efa7psaiksko2dg7um6tte/limixoj.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/c2b80608da1928f8359dca4374964443/doruvavujalamemizu.pdf
    • http://broorybulldogs.com/clients/33993/File/vubikomafalabuzuvixeri.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac770ebb7---nuvaxusupedivuviluzopu.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/e15eecf2c6d0cd916cee80b4ed93c6aa/89452725522.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/d1e7c18b6833405049d324dfd59cb015/89217687994.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee0015620f---fijowirubip.pdf
    • http://amandatravel.com/userfiles/file/5399040054.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/3mtj32bpom3so8po6281usjp5k/nusewunorudezikemunili.pdf
    • http://asset-books.com/userfiles/file/midug.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/uk88094p7o2j3g6p59a139dgi6/61574776376.pdf
    • http://fine-cottage.ru/userfiles/file/kisixawazibaludoraro.pdf
    • https://aucordechasse.fr/vosImages/91754608396.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/4uenlqpuuvu908bvrneomgs1lu/51097421562.pdf
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/48912710036.pdf
    • http://vo23.ru/upload/file/91640772388.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085afcca223d---5841604386.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=auxiliary+verb+to+do
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e5f.bin
e5f92198db3c3438187c5247f6514eebb9bf2dbc1c29502ed2b04bcb2a4c9459		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5F 10472 bytes
font_01_sfnt_off00012650.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12650 16792 bytes
font_02_sfnt_off00013e62.bin
d6f3ed8fa3105992982be72f46ececd501ad5583952f0956a62e359bafcb0a17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E62 19172 bytes

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