Malicious PDF — malware analysis report

Static analysis result for SHA-256 56149f2fb6484fd5…

MALICIOUS

PDF

87.4 KB Created: 2021-06-25 19:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8299ec9555cf10dab555e0081cf6bab8 SHA-1: 0a20a11ab0ee20ebf8c290c50cfde4081ccfc607 SHA-256: 56149f2fb6484fd5e83e5bc729a6e37e512d9af35d37b829daaca6330558aeda
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/4fuc2k25cbdumd9ebofobr32m6/jijakop.pdf In PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/6a638f5488c6e8c0d89a9125b92fb2cd/rusupe.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/b4e4c1b37f9c820648d1f00bcd761228/53105075224.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/5tprmk42mg7edlstq2nkdli9i1/19362775792.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/2056c8efa941c1fad028fa6f3197fb60/54578120780.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/f18acca8b30c05f3cba3d3d160c35de5/dofedodobeno.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/4787ce00b2423c0cc1b85dfacd166286/madoramudaxebofudumoba.pdfIn PDF document text
    • http://newfieldclassof1982.com/clients/6/69/69e49ffade321d977af769e13f9f004b/File/mivoguluzowunowoxunovino.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/1c7e8a3e82820b068cf74718f916ba96/57365133816.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeb56058fa---7853791972.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/lemifatoxe.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/8c31557c417269879bd716d2e85a0ecb/bemotafaviluzigalusawul.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/47008560458.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/67ae8a1c914a983a1ea6e9edd9ed2696/semuwilodaxisobewuvasew.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ceb46a088a---fokojiberires.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04fa1270d3---88198630804.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/f5otnl3fup5a3e6f21po4mon9s/dadutatarasogovowomolawi.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b58b0b73fc7---miratoluruvamuw.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c432af9333a---sobidadegejinisipa.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/42685819846.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/33844898462.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609da7c0e8cd6---gemolup.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/i845s0uo29rf0338lmbqs9p7p5/fogoxasiridivuzujixube.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/4ec098f78c4794df19da2335a5c1137c/sokoropazenix.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/34208956373.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=american+girl+name+start+with+sPDF 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_off0000f2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B08 10624 bytes
SHA-256: 497b483ffd4dfa739a3455dfbb8d20628dd0526d78ae6274464906b1ff27eb69
font_02_sfnt_off0001232e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232E 17408 bytes
SHA-256: 2ccaee2d4dbc089bdb8e1c05c59abf400886c56021110e4a444b113bd91499cd

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