Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a65480dcb4fb24…

MALICIOUS

PDF

92.1 KB Created: 2021-06-27 03:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 24018b97fc3f9ec2ef5a677bafc168ec SHA-1: 4ca575550e746fc1157cebcc1ea339ee14902821 SHA-256: 67a65480dcb4fb24ce410c71029c6a822d40721d7306a9b20572de329c65d114
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and potentially disposable hosting domains. These links likely serve as a lure for phishing or to download further malicious content, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/1c6535ae0e8b047f907c3a4ebb0c0e13/21647392299.pdf
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/zuripoparexepesesuwigi.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/f543b3697a44b4887e0acfdd52bac214/85680617120.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/17fe60af01f4e764baf87ee7eb71d3d2/lixuzevexatelomarexomej.pdf
    • http://clarksville.net/wysiwygfiles/file/zarikufubegunegenula.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/d9e12bedd70c4661dc4cac08732531ff/69516048856.pdf
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/74146114115.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/d5b15a89cfba483c924d70a8c5cc73eb/9756171050.pdf
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/jevoviveviwolavame.pdf
    • http://creptiles.dk/userfiles/file/72083726960.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/15a4e4fcf70000b93d2cdba24861c87d/fofidov.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/83dbadf78328c3668b5e2a1c223b456d/litedemodi.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f0a003e97---javasulebixototudopim.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c235b330ca---19038635585.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607e85de9d28b---juxilonininakat.pdf
    • https://tappowine.com/file/xuxokirenomafegeresiziz.pdf
    • http://werkkledingverkoop.nl/images/docman/files/kikipinolonakitezowuxonox.pdf
    • https://rzfmuhasebe.com/userfiles/file/dopabilub.pdf
    • http://bajcsidavidfoto.com/_user/file/tasoxogubidulovelilosino.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/rt0h5ov858oqrvfei3gh8ed427/77438744467.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/5541ea51e299e8d897910df3803fda64/wuzikupomikukuberinaz.pdf
    • https://arch.ua/ckfinder/userfiles/files/vararitafotovi.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/6d5b4fc8369532219f8f151c29484102/57416126905.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b402bada4---zemovugivenafolowa.pdf
    • http://www.radanhorse.com/resource/files/81431487251.pdf
    • https://ferado.vn/userfiles/file/25369110381.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=12+pm+mountain+time+to+eastern+time
    • 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_off000103a4.bin
b431b9042819fc57d79fc45a706b6b624b232add170c4e6de6b518ef73f70abb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103A4 17884 bytes
font_01_sfnt_off000132dd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132DD 16792 bytes
font_02_sfnt_off00014af4.bin
cd253291a6cde1502e9c599c1c63c3450296dd535515bccb2388d2fbad9ea988		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF4 10540 bytes

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