Malicious PDF — malware analysis report

Static analysis result for SHA-256 9082d92647d2ccb1…

MALICIOUS

PDF

72.1 KB Created: 2021-09-04 18:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e14d7cfbad38e1f40f0ea1a95634a226 SHA-1: 665fe115187c1b186807abecc2811520f11d994a SHA-256: 9082d92647d2ccb1b1e7a5890d4f51d4aa66caa5196d9641206c6c6b24917b97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into downloading further malware or submitting sensitive information. The presence of multiple links on disposable or compromised hosting reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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 http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/mv7mmog9m2gahddf6vql0mafh3/tenomirajid.pdf In PDF document text
    • http://aucoindeshalles.fr/menu/file/sogisomipub.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e91dc2e0a23---42860912921.pdfIn PDF document text
    • https://andrejc.si/files/file/40133090734.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fefd991a7d0---jipodusamufaduzojopidiw.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/97361772575.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/87484257712.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/nutejovekudovamokofo.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960ead8d99f.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/c597c798cc53ebcb4f6c613bd43b8870/18817159126.pdfIn PDF document text
    • https://jdlpartnerss.com/userfiles/file/sopezojuvekalemagifebugew.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/762a62b0586721926a4ccb5412a4eb68/gakemebotawudow.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607e454769521---kavafupabuvezekefap.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/da6srpik22i0kiain39ou4t6uc/1647052372.pdfIn PDF document text
    • https://hinaweb.com/upload/file/mijagiv.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/er1l21gvvi7jh3t2she9rr2hd4/wazusutebesonevefavazo.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ed4dc3a8b---61994973201.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607650d6b87d0---gomuk.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/kijivobibesid.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/47185510005.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9ca0df2cb---66709400839.pdfIn PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/78348976936.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=inorganic+chemistry+pdf+housecroftPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00A 11188 bytes
SHA-256: 22e08c60180e76e8decf206b699613408911f1aef07183c7bd4d75bb47481e99
font_02_sfnt_off0000e9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DE 16184 bytes
SHA-256: 7655dab3352f3e69b2a2ac07f036b5571c06c01775b5a825e71429eb79187b41

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