Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed724350d63fa58…

MALICIOUS

PDF

82.7 KB Created: 2021-07-26 03:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: dbb596032e630a845ffdf4c317ee3d8e SHA-1: cb7147bd968169393518724220dace8db390da62 SHA-256: 2ed724350d63fa58e6a8086234e0e0b1b488f2bf0fc188f28f4e01b84707f70f
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://donkaew-furniture.com/ckfinder/userfiles/files/mexudelegunod.pdf In PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/c3c18c6f5e1c7344af0bed7e59d09563/50043182342.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/lizewilejekeranewotawu.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/16765527973.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/1956430518.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/mokilarivezokefifaxusoro.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210530122028.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/3d30e13127a689c3c934a89823c26944/30345225578.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/e39059d99f7fd026722d2580cd2add55/gexatizirajonaras.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984833b35cf---fivapuneradowezexezitodi.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/buwewibe.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/33830161597.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/nejeporujudu.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/id0eog5nv3opiu84st1pt8tvj6/1799316860.pdfIn PDF document text
    • https://derey.nl/app/webroot/files/userfiles/files/97555972483.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/1b85df7a2312b14cad981afcac2adb04/novupanemibubidajikijo.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/18a74acc768a32517b9eb5664fa0180c/tobane.pdfIn PDF document text
    • http://fine-trading-knotwork.de/uploads/media/91958463694.pdfIn PDF document text
    • http://hogan1973.com/clients/d/d4/d4eda5e2427b34f3a15374adde9a77da/File/25453389031.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/08niqeucqie1t6h0381r92frum/tinevaro.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/duvakuwanetofotitogiw.pdfIn PDF document text
    • https://canoe.ro/Extras/ckfinder/userfiles/files/78139494515.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/71968237462.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/punov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+use+topsy+turvy+planterPDF 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_off0000e0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FE 10512 bytes
SHA-256: 4b2485651ddfd1582655f02e5bd9677159584ddbb829795fcb80753d534f4648
font_01_sfnt_off0000f922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF922 16912 bytes
SHA-256: 353580921e53f0b68b4da78ea819078d90ac2876e2b77791b2196e8d645d0365
font_02_sfnt_off0001257e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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