Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c04484463e3654…

MALICIOUS

PDF

77.6 KB Created: 2021-06-30 22:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39e9465fb14157386d8e439be41f2a51 SHA-1: 52d2a13e0ab2282eceb993fff433cf2d01eb2895 SHA-256: d2c04484463e3654bb80140d9a6c00732f0c728c8a7b13ee9a48cd1ab8134a57
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to various websites, many of which appear to be compromised WordPress installations. The primary purpose is likely to direct users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://medvor.ru/uplcv?utm_term=what+two+colors+make+grey+paint
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/0969d7e68048f12b8c1900b03c7787de/wulivexukos.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862c0f6927e---87995433214.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/ab50d6987c068fc35455fe9c467a4db0/8501061851.pdf
    • http://alhouti.com/userfiles/file/66229386560.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf945ebd46---javikinofedunesitupukuz.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/baba6aa560ba9b6f6263ccc1af4a669a/telugolerunufusamu.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/c2e97d0dc8a9033c5e7dadf981d415e5/49990922094.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/onb9th9b8snhheouub71hbh6f6/38111689881.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/35io8v7jro172oba4lgq7u4690/mimilebukeferu.pdf
    • https://gbagencement.fr/uploads/file/xazufemageruketofiponujo.pdf
    • http://dlikefulproductions.com/clients/875850/File/83631384807.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/kp36988d4122nmtm3hiv382b11/luloxamivogoselikil.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d18a602d---45196773.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/e7c75a24e713a2fbaab03ccec902b2e9/teketate.pdf
    • http://fresh-j.info/images/uploadedimages/file/77636951553.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/9dpk9b09rpl8mkokic7fc6pru7/58411476951.pdf
    • http://innotec-industrie.be/userfiles/file/gigivoragufizimetemasuz.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/sps0fa2h3b39s78vc198jte3o0/90647332312.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/tb40216nuiv05boav0ihr4kdh0/repakonibizetimoj.pdf
    • http://shinex-auto.com/userfiles/file/josaxekezigafimifal.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/b08e80dcf9159e56ada935fb2aadf7c5/xalonikoluzarekuguwo.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/0f87f63e0cded252f285eb300e0128a7/89518354081.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/kuvozeto.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/5844cb4d479eb9199f6aee1ead8b8728/nixewuxifane.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_off0000ccd7.bin
b7981817fd97f0e2812d29a88d97b0a3cb3151951155f05cf50a39af518e3a47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD7 11108 bytes
font_01_sfnt_off0000e6af.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AF 16792 bytes
font_02_sfnt_off0000fec1.bin
f1553cd376f802ca64eac42b33a9561c6a225c202dd5074456c51daf1ff18cb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC1 16332 bytes

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