Malicious PDF — malware analysis report

Static analysis result for SHA-256 f020066b9194635d…

MALICIOUS

PDF

75.6 KB Created: 2021-07-03 00:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7eaaac94c0e994d1079f45c974712e23 SHA-1: 3a2bfa32b0a585c88e4e10d1d32c50ab15005038 SHA-256: f020066b9194635d624a5e724787e9c4c1425fc616a1eab37ff71a5c3fe8ea11
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability or contains malicious content. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites hosted on potentially disposable domains. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest an intent to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://vienhung.com/webroot/img/files/vuzolaseligixerutekuna.pdf In PDF document text
    • https://daiichigroup.net/uploads/news_file/kadukiviraserodirif.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/78420028261.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/relopososuwopuwesozuvalo.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/93630654151.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607461e89319f---vixojupux.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/a6c5819eed8534f61be75326991aaf7f/39878532062.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/e359b0ea5d54cf6245543ee16fc9709d/39139270578.pdfIn PDF document text
    • http://indel.sk/userfiles/file/gotifulob.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16088723db6b5a---15699522931.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/m5dcjbimpscvctf4221r5ukir4/29656875008.pdfIn PDF document text
    • https://vieclamhanoi247.com/upload/files/lilesetela.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/cdfa2e3ef0053c58f3b11955571a8fc2/19261108362.pdfIn PDF document text
    • http://steammining.com/userfiles/file/49261820353.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/lizazokoluw.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/gurusutuvumafidojiz.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/6cb27e87537e8104449bc7db1a2ebbae/jopukipewirevixazu.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3751ad8ea9---zotuvatawirotudujagajuj.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b5020a20039---gevijevuranujibuli.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c3d14e60d---wiwisu.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/7d7d79a643f9e0a119ed5738db6a0439/teragozanikanegur.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098cbf8e2023---dovujaj.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0885a64d6---kulenamadorumofabadit.pdfIn PDF document text
    • https://businesslife.com/content/files/pogesilidezetoruwugoligu.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078c5f0ab981---dajezubimenaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=what+is+graphic+informationPDF 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_off0000c739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC739 10744 bytes
SHA-256: 589feab03763a533816bc31cc15c92cf5ce24aae4c4742a3997a223de0ecf306
font_01_sfnt_off0000dfc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC6 16016 bytes
SHA-256: 04bf420b731100830643331bd543f24f90f7f57a6ce118a5bf9608556283e244
font_02_sfnt_off00010931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10931 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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