Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a75e23173fc3f9c…

MALICIOUS

PDF

83.8 KB Created: 2021-07-04 14:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ab4c91caad1c71f79b071c060508caaa SHA-1: 2e9feac60e5f0211ae6a3cc2b2dc7094dd5ba5bc SHA-256: 0a75e23173fc3f9c3439f6f85ed56d1ce4513de0ae19d09c713e0ea77164411a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically pointing to other PDF files, suggests a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which could be used to facilitate the download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gregor-biffiger.ch/userfiles/file/14397295952.pdf
    • http://am-assets.com/aom/magnolia/userfiles/file/64785393460.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fa30687a4---gunonajodepiwugaro.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cedb2aa1b69dd9993e3f004696dfb276/litadumexowa.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075491d9ecb9---71620725192.pdf
    • https://actor-conseil.com/files/file/96503705028.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/l82i056does9d9d57v93lcd8ih/76872407712.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072d459be5f8---lodubovofe.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d72d3616b0d---nodeposapomi.pdf
    • https://franchiseharbor.com/files/files/17207483426.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/mqn28lurr0oqdklc8qjh5m7e00/27715796695.pdf
    • http://messtores.ca/fck_user_files/file/36441467432.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b48e3b1ce---52857179741.pdf
    • http://indago-rovigo.it/userfiles/files/83967354459.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/36b534c8b12988a6eb7fd46aca06b3d5/sapudaleto.pdf
    • http://tms-technology.com/ckfinder/userfiles/files/nuxuvitifodexuziroxerib.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16081f08fb1af8---79692311644.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/40ed906aa26847ebcd49596b62d056e6/939655117.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2644229c5---zigofefas.pdf
    • https://bookatowncar.com/userfiles/file/lesodelejipaxanivudu.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606d68447274b---80649168747.pdf
    • http://zrdb-drogbud.pl/Upload/file/46151677784.pdf
    • https://schmitz.cz/res/file/53441895527.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/a32f471982c718c695d3a828628b4bae/51642213380.pdf
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/54028866389.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=electric+current+and+its+effects+class+7+question+answer
    • 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_off0000e479.bin
d230306d74ca27dc00857fbe9c20b7e3646cce8d9d2f3d515f1906e2d3c40145		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE479 10832 bytes
font_01_sfnt_off0000fd78.bin
e06d7b4fcf3423c9673d48f626baf9954a6304af9552a07c34fc2d2337457c36		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD78 16844 bytes
font_02_sfnt_off0001295d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1295D 16792 bytes

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