Malicious PDF — malware analysis report

Static analysis result for SHA-256 024f7c804ca293cb…

MALICIOUS

PDF

79.2 KB Created: 2021-09-05 19:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f2248472d860486fc92074e935de2c8e SHA-1: 97d14af9fd01ab787aebd0fb7b6a7b2194800777 SHA-256: 024f7c804ca293cb63bd30126559589341e56ce6dab34bc73029de808ff98de9
156 Risk Score

Malware Insights

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

This PDF 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 multiple compromised or disposable hosting sites. The embedded URLs and the PDF structure suggest an attempt to exploit users by directing them to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://songhakbbq.com/uploads/files/53487696586.pdf In PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/9inrr54loft8rincede5t5tb73/nagepo.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/zujepibunu.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/ratadututoxelodulisuwa.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717f564c857---karanazivib.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa91fc4395c---68424587640.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/jamupinunupas.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b21113ee335---36325488126.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16071fe5d35377---26676060936.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b81eeda2ecf---42768922659.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607ec22925c60---46529538669.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/12826181746.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/e940d30aa2814b5fdc019228fc5429c7/25933303928.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/xejonoralopadijowor.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/4118984675.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/98779376687.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832cea05048---43229605357.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/pedifuru.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a60c92b9a---vopukowofutekesozotevi.pdfIn PDF document text
    • http://japan-railpass.info/images/blog//file/kewezikugidovonisaz.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/1694871116.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/sikebanugifojowa.pdfIn PDF document text
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/57166298653.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/19b77bf55dba86994b451334f81d3ad4/57597191919.pdfIn PDF document text
    • https://rjpexport.com/files/buwepovan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=everdure+furnace+manualPDF 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_off0000cf2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2E 18164 bytes
SHA-256: 8e491a9b8b7e3e760421c463cd4195da27b2d7eb2d676354dfaa7d589576b2fa
font_01_sfnt_off0000fe62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE62 10308 bytes
SHA-256: 0fb32bd124c8512bbd438bd16c22dffb0de30b0d7f780ae5ab2f2f94a9eb1559
font_02_sfnt_off00011590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11590 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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