Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e49f995cee94b22…

MALICIOUS

PDF

78.3 KB Created: 2021-07-16 01:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e078e0a279ddde2333610cb86e9fb851 SHA-1: b6ba37f6390d73200f40ee3ab73e6219796220db SHA-256: 9e49f995cee94b22bd7ed4581602021b9ca9e30acdb46a3169c6069172b1cdcb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous URLs, many hosted on compromised websites, which are likely intended to distribute malware or lead to phishing pages. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, further suggesting malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://pomodorolennep.de/gfx/userfiles/files/lodesexoda.pdf
    • http://ithaca1961.com/clients/875375/File/40855575890.pdf
    • http://loscogliodifavignana.it/userfiles/files/89579462073.pdf
    • https://tl-systems.hu/files/files/jizemoxutixa.pdf
    • https://argumentua.com/i/file/pofepebomed.pdf
    • http://apcmagon.com/userfiles/29543673026.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/13bf1ec92d47c6ef1b9770aee79f66bf/86082382459.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d705d76c317---45742604424.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082501c5b54f---gomubu.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bca1f69bbc5---bivijitusudutelilojesukeg.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737a5737e10---85070766603.pdf
    • http://absolutelyneon.com/userfiles/file/tuzuteleleve.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a6265320271---vukewi.pdf
    • http://ronniejoymemorialfund.com/clients/1/1a/1a75100f29d804137a154ca93ef51a80/File/wukosasojowi.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ovev9m4hi61t0jodprjc4294l1/zadalopubewewol.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ae80bcadf---17562837694.pdf
    • http://norilskgu.ru/userfiles/file/bevil.pdf
    • http://www.aportecnica.com/imagenes/editor/file/11794348230.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/e49a11d547c1339d500baa053efdc84f/87416644075.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f019e1272---93383150952.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaaa9333cb7---97433653315.pdf
    • https://arhometutor.com/userfiles/file/darusobuxidimejizagutozug.pdf
    • https://elnativocoffee.com/silver/upload/files/10432925286.pdf
    • http://tunesistudio.eu/userfiles/files/52692481393.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=shadow+the+hedgehog+rom+download
    • 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_off0000d0b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B6 16792 bytes
font_01_sfnt_off0000e8c8.bin
cf0b7d3ecf4c9872289d373610ae69d773dcbc65a01a68888ae9c8a7c401484b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C8 16712 bytes
font_02_sfnt_off00011430.bin
4f27d78c0e493819be00a81a47684b03fca7693eac7a0e873aa05d593fe0f0eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11430 10596 bytes