Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea247f99a78b5d10…

MALICIOUS

PDF

86.1 KB Created: 2021-09-07 02:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 64fcda97190f210e2458eaf36d5da6a6 SHA-1: e4b900852a704219f39b4779fdfb9bd95bf6ad22 SHA-256: ea247f99a78b5d1050125fb36fcd94b4286f34b669a3c3f08ab7ff871e5fd206
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The presence of numerous links on disposable or potentially compromised hosting suggests an attempt to distribute phishing content or further malware.

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 http://jaatkinson.com/userimages/devuzupijumalesir.pdf In PDF document text
    • http://bobiniauto.com/userfiles/file/90187960706.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/narukumibizoparevizog.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/d6bab137c2adcafe90c03609431500ed/39196017614.pdfIn PDF document text
    • https://signika.pl/Upload/file/14208872214.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079f590743da---dituzonobajaripimizurej.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/deduvategekonatesokipelu.pdfIn PDF document text
    • http://takramaipai.com/mypicture/file/janibaxor.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/bebhetp6p7t65g8tvt26o1dt01/72764676943.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/kupin.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/misegabofominanugenez.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/telematad.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b898b222fcd---1778912155.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/foremadoji.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/luxaxizixugapatasumugaga.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/2004de2a0b575b0e96e4fd84e4d82b92/bixawona.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c77693249cf---47230803963.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c286c55ef---dajelax.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/942opu17d2akj93tvn775l52u2/pujuxubutefupovafuzote.pdfIn PDF document text
    • http://specimport.by/files/files/buxosevuva.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/jegexazojasarap.pdfIn PDF document text
    • http://01host.ru/userfiles/files/wexaparozemu.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16077becd4185f---zesafafedetikapema.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=vangeli+apocrifi+testi+pdfPDF 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_off0000ecda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDA 10764 bytes
SHA-256: ecda099f6de4ca130489788b69d0c698cc5b64925c68d40db1f0125316b421e0
font_01_sfnt_off0001058e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA0 17400 bytes
SHA-256: 57124edb5b832b7c77dca4813b8d9bf2d4b4b365a2d42f0bef90a109a5dc4d2b

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