Malicious PDF — malware analysis report

Static analysis result for SHA-256 5200e2c1132365e6…

MALICIOUS

PDF

86.1 KB Created: 2021-07-03 12:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 88426e307bcb1c48362a743ba240219e SHA-1: 6b2115a098e8620c38638b74a00dddd4fed33af6 SHA-256: 5200e2c1132365e69b429b7506dae30dead83b5cfc79662b01f9e3d6a12c4b3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to lure users to external sites. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830dcada278---kijobupuri.pdf In PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d55231a1c0e---gebawerewodalev.pdfIn PDF document text
    • https://parc-hotel.info/file/77431782043.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/73947730594.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/27902302935.pdfIn PDF document text
    • http://flexa.cz/docs/file/22659021361.pdfIn PDF document text
    • https://dm288.com/slicice/file/36614257722.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/wapesi.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/vegijoduzit.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/wapivaratobuzolekatariz.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c825ad4d98---bitazopazufu.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d4a8cfa6bf0---35267703899.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c517f30cbc5---11489773052.pdfIn PDF document text
    • http://ruoumoc.com/upload/files/71105649210.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/vunizulagagojusesazolafon.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/lgfbq7077lvdh8e41vk3hu9s7m/15770569529.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160740f1880f7d---45580241138.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/pdndp3k9cdlu6kr1va03ieipcs/43300644821.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/efef8ce69d4372462686729b712889fe/4537121915.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f030ab7a58---66884692958.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16099f552d1503---92465434740.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/egbtja4rt0ktumjl7uhjsuf3ep/gamusunomidimusugisir.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/isp2rn1h52ugl7ho40qu6c4099/kidom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=hydrocracking+process+in+refineryPDF 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_off0000eb33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB33 18008 bytes
SHA-256: 58b04291650ac75da30d7fd59a8ca7cfe73ee9ffb8d1fa7cc3ca0a08ca30566f
font_01_sfnt_off00011a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13274 10848 bytes
SHA-256: fb5d853f0d71ec6472a3bb9dbdc84acc8d84f5122fe4c17f352758da838a4eab

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