Malicious PDF — malware analysis report

Static analysis result for SHA-256 9632ab002049f148…

MALICIOUS

PDF

71.0 KB Created: 2021-09-25 03:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f7fe24cc969537d4cb23de7c05c1ba56 SHA-1: 8a302a141b6bf624e54e3e2211f8efe9d3048461 SHA-256: 9632ab002049f148ae641626271c981b856b4d3758aebb57320830e6f6155512
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised WordPress installations. The presence of these links suggests an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/81236941222.pdf In PDF document text
    • https://andana.us/files/files/53564004083.pdfIn PDF document text
    • https://tebra.si/userfiles/file/40884404450.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/vusanafozozivomidudo.pdfIn PDF document text
    • http://harckocsik.hu/userfiles/file/vefinavowivixatekimasa.pdfIn PDF document text
    • https://matratva.in/userfiles/file/39480105077.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/pogumedu.pdfIn PDF document text
    • http://lapalettedesarts.fr/gestion/file/84645835336.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/68369503829.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/zoruwiwere.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/dagatemiko.pdfIn PDF document text
    • http://moje-stranky.eu/userfiles/file/rogur.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416bde5857b---79574272347.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/nizifizamakatufev.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/163256d7cc0c238214df8fbf8b6f9724/24125153315.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/66691181387.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/05ov2pfgjvvuanudam0g6hvkmk/mefuse.pdfIn PDF document text
    • https://protrialse.eu/files/files/29139009659.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/58393511814.pdfIn PDF document text
    • http://thepnguyentran.com/media/ftp/file/detujogazo.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/85508925801.pdfIn PDF document text
    • http://partnercable.hu/files/30271396838.pdfIn PDF document text
    • http://traktor-tv.de/sites/default/files/file/kidipibatasexutuwil.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/15459247910.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/jubibakaraxobemuzezigal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=website+to+watch+live+matchPDF 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_off0000b434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB434 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC46 16252 bytes
SHA-256: 04ecbaf3bb730d0d76c9ec384e1aac04f7a41bc40defe5550bbeb0e189b09002
font_02_sfnt_off0000f59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59A 10576 bytes
SHA-256: baaeb8ed54a48e91e6fdb1f09d4f32c2ce04a1b360f9b42c3cfde2ceb6f600c9