Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb3b44e06874697…

MALICIOUS

PDF

74.6 KB Created: 2021-06-16 12:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6db9691991e87b119ebcafeb782963cc SHA-1: 9c6085d0c0b6af9843fece0c90143b9d03767c9a SHA-256: deb3b44e06874697481b15f6d85de86bb04325f70c319d5152e1ef753efc6d22
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://archism.ru/uplcv?utm_term=emotionally+focused+therapy+pdf PDF link annotation
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb4707e83a---xesezetutunozufeferig.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/fofexazen.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/tuvezakemuxanur.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/53e53187fa2d3f9d2bc01de100b27ab2/sukufazixasev.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/49c45000d52b1075a27a627ed3649923/kufugaluvuvivokid.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab4c3d7af6---bezunesa.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ae898e79c42---jaburuvajasoxufojug.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16080e90d5108b---linulizowokopisaleto.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/9b9cae876e46aefcc406264638e758d7/68535404046.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/i8venp29qt7q8busi6rm6st6b3/961549775.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871f640ad99---xovus.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5d08d5d59---64856499829.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/njtvhk701ajmdfg1rkcgcj4lgt/rapiwumak.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/8419914869.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160978fda30234---26372059188.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AB 5452 bytes
SHA-256: 5527b83211d660ad952ed62ce0705a6d10789f8d3d31428e8d285f6a3a97c0df
font_01_sfnt_off0000fc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC15 9844 bytes
SHA-256: f5bd020f5c045957b0c2e6fed3217f9f896d95436e5d9794cc612567ee106f11