Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f971ce8a0a4c971…

MALICIOUS

PDF

84.2 KB Created: 2021-08-19 01:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0ef2d44a549c496082341f0debf14181 SHA-1: f763bc949a94426fcde9c80570fbed7052c767c8 SHA-256: 2f971ce8a0a4c971508f70b1c6d32257ae88d777c036fbf6dc3d504dbe922511
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is unreadable, but the heuristic firings and URL analysis confirm its function as a deceptive link aggregator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/b5f4ad65814add51cd501e97b2290855/nezusatanogajokiwudefoje.pdf In PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/34375880627.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/76990295c94606b140af1976c1caeef7/86386121722.pdfIn PDF document text
    • https://gad-elhak.com/userfiles/file/zulawemifove.pdfIn PDF document text
    • https://self-storage.sg/images/uploadedimages/file/fefipugimemijusiwowa.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/25545546564.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f4ca004f1---vebesogetup.pdfIn PDF document text
    • http://stilistspb.online/public/files/uploads/files/wajowumin.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/vovowozale.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98c4356087---jenotezo.pdfIn PDF document text
    • http://sieuthivatlieuhoanthien.com/upload/files/9871595990.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6d6c532b2---wazurawojiselo.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/5eluccclkkkg3ujs54pghe6tc3/lojitigonife.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/tevanebizusax.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d8b723be1---87280725166.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/11433234409.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/b88210f36db10c02c9d6e25833873115/tabawuwulur.pdfIn PDF document text
    • http://cphs1970.net/clients/877309/File/tijavoxubufeturifuti.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f51cb9e534---gafunegabivalanetobuke.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/37211351197.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/zesemuvelage.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/fajul.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/9478147988.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=see+if+someone+blocked+you+on+discordPDF 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_off0000e2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DB 17024 bytes
SHA-256: 01339248f573524860bd7d77807d3d35d68624ee0a57304d48b8bf7ca6f39fc4
font_01_sfnt_off00010f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F89 10900 bytes
SHA-256: 8acce39f3a809e21774a42ebe43b5f2f5733c00ed5340819733843c01aa53dfe
font_02_sfnt_off000128b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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