Malicious PDF — malware analysis report

Static analysis result for SHA-256 972c02b95a0e6d59…

MALICIOUS

PDF

77.3 KB Created: 2021-10-01 07:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3ea0af5dd98c090de97bc4bf21a2d8de SHA-1: bdc54c32f4bd71eb06f49751dd0dd8f0021958f9 SHA-256: 972c02b95a0e6d59784e453e0268436ffbfc0d65b1f265ea9ec0da74b46530da
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URLs, many pointing to PDF files on unknown domains, suggests it is designed to lure users into downloading further malicious content or to participate in a phishing scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm structure likely used for obfuscation or to distribute malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://podimercrm.com/img/files/30791899417.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/e537f4e30209b16d289bfca71f5f5002/8974180052.pdf
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/39540619890.pdf
    • http://jwconsult2005.com/file_media/file_image/file/nuvemogobemusexopoz.pdf
    • http://spokoino.ru/i/upload/files/nupileweximesu.pdf
    • https://codefon.hu/js/ckfinder/userfiles/files/35190017876.pdf
    • http://hermanosgolbano.com/admin/fckeditor/editor/filemanager/connectors/phpfile/mukewajemefenurimariko.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141c13c926ab---raxokezobetejudonemos.pdf
    • http://imssp.by/data/images/fxeditor/file/36556036531.pdf
    • http://www.binghan.my/userfiles/file/93215863120.pdf
    • http://jyjjapan.jp/files/ckeditor/files/24177360159.pdf
    • http://lingvastar.z-i-g-z-a-g.com/userfiles/files/bowujumunavitovemoj.pdf
    • http://thaihotelsale.com/FileData/ckfinder/files/20210914_B072E131829DE46B.pdf
    • http://dvif.fr/userfiles/file/21420822175.pdf
    • https://kfk-dekoration.dk/images/uploadedimages/file/roxapajala.pdf
    • http://allergya.news-read.com/upload/files/15902410544.pdf
    • http://aurastaffing.es/upload/file/xezudokisiga.pdf
    • http://printific.com/images/contentimages/files/46098019550.pdf
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/55928314491.pdf
    • http://homestationrealty.com/userfiles/files/wironexabefiwatetopo.pdf
    • http://esipro.fr/userfiles/file/53431260474.pdf
    • http://hidropro.hu/upload/86659983143.pdf
    • http://www.prodomasa.com/ckfinder/userfiles/files/vorupuxugodafirekexiget.pdf
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/wesawikukonoluvex.pdf
    • http://duz-drustvo.si/uporabnik/file/jasome.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=jerk+off+adult+game
    • 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_off0000c55b.bin
c3cec4da8f629ff431f7f7f867ac30c065e8f0a1c8aa194c7567535943b83f20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC55B 18748 bytes
font_01_sfnt_off0000f617.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF617 16792 bytes
font_02_sfnt_off00010e2e.bin
27db2bb29bf653459d022866a67e9956778633126a985b107646a7ee44143f77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2E 10516 bytes

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