Malicious PDF — malware analysis report

Static analysis result for SHA-256 314bc3c2726b0ea9…

MALICIOUS

PDF

86.4 KB Created: 2021-06-26 15:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 52571898631cc61f273a0dc18e2f9476 SHA-1: 3b1b311ad795c2184dd93293cc6401bdee9e4c79 SHA-256: 314bc3c2726b0ea9e14e9c48059220a0a602faef7bc3c0eaffc83ddf87e8fe14
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of external URIs and link farms points towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://burelomdo.com/ckfinder/userfiles/files/82711280634.pdf In PDF document text
    • https://meganimal.pt/site/upload/file/2218384320.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/4e3ccdc47694ade9ae36cceb2911124e/55026996200.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/f299946b4f3c712d6bee720da0408eb4/30801312156.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/498cb9222629f90150180a216063b363/betolipatufudamedepov.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160923a9f2839e---15050223111.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/lizeruvakabezodutiwilukol.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/8746d1efdb8146ce9198071a94228d18/xapaku.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608d014c91614---fanelolasawebegowoj.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/4b399656f58a29b0a07b64c2e0095ab1/95427227090.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/8634782faad50b9ab894cc71a465946c/37217224619.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/0quc39qajfu34livkjr0p4o341/25346425341.pdfIn PDF document text
    • http://kudusde.org/resimler/files/lewawawiv.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/fc6187de1025ff78d2552d68826c8e6c/97500271327.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/50444075400.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c49b20c2c---vuwibi.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/79626049588.pdfIn PDF document text
    • https://cristalensi.com/public/File/43442547596.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d430c0b5d35---wutofonakalotajejesajetev.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/37df5e96d47b8ae36db2d56f08517de2/59177218036.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/6cd9a1e7712e5868441e9e2c7322c571/tugonunovumeravikib.pdfIn PDF document text
    • http://614move.com/clients/4890/File/2337376607.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/f0f516512e068f12813459f46ed37da1/86625284076.pdfIn PDF document text
    • http://qytbearing.com/upfile/file/61510934486.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=best+rugby+refereePDF 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_off0000ed6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 18032 bytes
SHA-256: 9cf6a2e2eb5d26e10220d379e8429d77b16fc4f494aa94d40d19d6a5ed8e7734
font_01_sfnt_off00011bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFB 10272 bytes
SHA-256: 4945b0aa7a2949a118cbaa716dea673ecbd949205da3d813083cbb83173cff86
font_02_sfnt_off00013354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13354 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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