Malicious PDF — malware analysis report

Static analysis result for SHA-256 2299fdb6a80ac38e…

MALICIOUS

PDF

88.6 KB Created: 2021-07-03 01:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: ded25e2a3794fd73ece3d36c176a05bc SHA-1: f9ee21f62a5947ca5d18b314e5bddf3c9fb7e503 SHA-256: 2299fdb6a80ac38ec2118c836737aadbc9c412daea63d94afd917818b6302d42
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute further malicious content. The presence of external URIs and link farms on disposable hosting further supports its role in a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/42022696027.pdf In PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/3unbt9kr3ebkgt44ml2mu2ir09/rozerolatedos.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab94cebcac7---69531966947.pdfIn PDF document text
    • http://flomojapan.com/upload/files/78490345288.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/45436297395.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/dgd0l9b047cjrci91i3iojfv27/48620710679.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/39a5687ca5fcf8342032a1b5a53fb1f2/tatemip.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/48cfe0d994ab475c5ca1200709336fb3/xipiwulonujibizimateb.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160acba7249233---10556234969.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/fenetukejapuzufugexasezez.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/of1q73vfh4dfck84n1unf34463/73165367462.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084caf6db6b9---12471171204.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5db21c982---41105874000.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/c8jj3e9r3evgrhe8rbcabmeva1/kopofikotobivuduvogalek.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1daab80ba---16148240817.pdfIn PDF document text
    • https://securitydm.com/slicice/file/podadi.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160739892bfee8---81706087846.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609fcb00826b7---30071819917.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098c0e33c482---lasadeviwa.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160be8c1c3d408---fezuk.pdfIn PDF document text
    • http://dallassymphonyleague.com/clients/1/14/14bb4a025281f1a32078cb68571f7cf3/File/72752929945.pdfIn PDF document text
    • https://seerupit.dk/assens/file/ribon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=dealing+with+python+spirit+of+constrictionPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFA 16060 bytes
SHA-256: 8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825
font_01_sfnt_off0000f10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001091f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091F 19344 bytes
SHA-256: 688c3a743e3e7083026e6bc4e82239b8fb5973d96115635403f667ffba4eac03
font_03_sfnt_off00013b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B07 10960 bytes
SHA-256: 343048f51f8bb60ff0c57d722bcc6a5bfa2d1259eb6005fec418c7512849f1b4

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