Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74c3bacea3a1d9e…

MALICIOUS

PDF

81.6 KB Created: 2021-09-13 09:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 377832f9163f92c5b5b26ef1260b2177 SHA-1: 124c543ab0569359f83097e5eef5ad85de657ef1 SHA-256: e74c3bacea3a1d9e389fcd6bad6116bb4c16beb93510cfc335a79ac5487b85a0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to potentially malicious domains, indicative of a phishing or malware distribution scheme. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the high ML score strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' point towards a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=precise+volume+control+android
    • http://csc0851.com/userfiles/file/20210913105549_mzhipc.pdf
    • http://angarakshaksecurity.com/userfiles/file/49855996623.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/96d205d1f193f6df0d2dad6fe4c671c4/tokose.pdf
    • http://mdknoodles.co/uploads/files/pimikab.pdf
    • http://gemaeldeundobjekte.de/uploads/files/24034242232.pdf
    • http://zhongyuemedia.com/filespath/files/20210901101032.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/mmtg3buiu546u63umbeqmhav60/kuludepuxax.pdf
    • https://globalmediaminds.com/uploads/files/93005182720.pdf
    • https://cafemocion.com/userfiles/file/jotaku.pdf
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/ludiroruxigonufugitawaso.pdf
    • https://nieruchomosciturystyczne.eu/files/file/kekevofidusipesisolewu.pdf
    • http://munnarinfo.in/userfiles/file/dexegoneluxuzuli.pdf
    • http://355353.ru/userfiles/file/salotenalu.pdf
    • https://fullgame.hu/uploads/files/jirizegafet.pdf
    • https://kanat.com/upload/ckfinder/files/59351674609.pdf
    • http://blessingsngo.in/userfiles/files/52593619897.pdf
    • http://clubselectionvoyages.net/images/file/tusomeno.pdf
    • http://fusen-es.info/yamituki-n/uploads/files/gegafijir.pdf
    • http://baracenter.be/userfiles/file/sewogeninu.pdf
    • https://philly.drinkpoint.com/uploads/files/mapeneroxoroxidokej.pdf
    • http://reicar.dk/userfiles/file/fivexapokavu.pdf
    • 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_off0000d8cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CF 16792 bytes
font_01_sfnt_off0000f0e6.bin
ba3b4aea8cc0099cf8b552b45e83c3fc313beb8a40fa0170f8d8092519d13a34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E6 10696 bytes
font_02_sfnt_off00010971.bin
70916643631607f8ee63d4db192e88ce3f004c69da37dea3990f9107ea571b91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10971 18092 bytes

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