Malicious PDF — malware analysis report

Static analysis result for SHA-256 80472057fef999f8…

MALICIOUS

PDF

81.5 KB Created: 2021-09-09 21:21:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b89ac941195c667643f24a1d051352cd SHA-1: 38ada81c5575107c86e3862ca599164fba42ecb2 SHA-256: 80472057fef999f8773b98553feb2aa087ac359875119988bbcfa331659f815b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to various compromised or disposable hosting sites. Crucially, it contains a 'clipboard command lure' which instructs the user to copy and paste content into a command-line interface, a common technique for executing second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://nomylo.ru/uplcv?utm_term=rom+xperia+xz+premium PDF link annotation
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/5462454410.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/gepimegojex.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/67680193628.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139aa0a43625---96578095137.pdfIn PDF document text
    • https://digiconelectronics.com/media/gaxuben.pdfIn PDF document text
    • https://karpzbeldowa.pl/uploads/userfiles/files/62059420183.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/xobemodewovabagisiraje.pdfIn PDF document text
    • https://adetexfoamgroup.centralcms.cloud/galeria/files/wadujipukuxego.pdfIn PDF document text
    • http://coomargroup.com/ckfinder/userfiles/files/zusowitemoliposojez.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9c2a589d2---jilidugafovebuwitefibere.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/uhc19o3huv2t4s2akq3l9ndb8b/64718436932.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/lativuxekukupusafufepuke.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/46064953478.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/96530908620.pdfIn PDF document text
    • http://abpjseah.news-read.com/upload/files/tixuxez.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/gebosabepefi.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210901225557.pdfIn PDF document text
    • http://rafaelokazakov.com/file/dokakefejomeje.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/zeleriwi.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/fogiwojilitasol.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/3e3f44306c694c8f5de52aa929ec1143/29676723771.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133b569ec9d5---19913675070.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/nilewo.pdfIn PDF document text
    • 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_off0000daaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAA 17704 bytes
SHA-256: 4bf59e5e9eb9eebe0a3915b579fb26f87e77fc0b397a29153ced7ea4d6ae6b79
font_01_sfnt_off00010950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10950 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12167 10304 bytes
SHA-256: 4d5d0e34aa6ee453da2e4ed3f1a839a9c0d45fbdcdd64d18dac3c5dbb1c23df4

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