Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e07d0511a87c9d…

MALICIOUS

PDF

90.3 KB Created: 2021-08-10 12:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 696466daa0753e7cb8cc4a255f103209 SHA-1: a739bd3913c18785ce4257a0fd93ee58d17b7218 SHA-256: 12e07d0511a87c9dc8185c35517d083279eeb054a659fd8084bc52b455e9f6b5
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. No scripts were extracted, but the primary attack pattern involves directing users to external, potentially malicious, URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/f8g0vr4i7pu184qp806cp44h25/3165163544.pdf In PDF document text
    • http://fritz-fahrlaender.ch/download/13545698555.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/gupoze.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/14863377465.pdfIn PDF document text
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/setasa.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/98554291798.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/95da0c57d1bf9aaa158e61df43ca66bb/jafirewofumitipoloj.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/23778801634.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0610759f8029a259ac4e99ca4f3a772e/55653642246.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/92619524630.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/656c2679adf0d56292909c4b6822ef26/95534689300.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd794c35df---66139457740.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/7gvhi5mrtavko404ui53pvuf59/revopu.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/36384605763.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b8939e385dd---sevofome.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bac0aa52d---92580571659.pdfIn PDF document text
    • https://mashtalkandil.com/userfiles/file/laroripob.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/465b0781cd68728153bcc98dcfc9fe6f/fefajojunafifelukulup.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160d6370521693---36787650785.pdfIn PDF document text
    • http://kokomo1986.com/clients/31029/File/kozova.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/favolisasikudavemebiduses.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/87365456159.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ceea1e103---mikavinap.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/jejudabevefajulobejatigip.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/df3ccc011de8c5e6a37c8a0215bfcd94/fozabijus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=simple+poll+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_off0000fd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD16 10384 bytes
SHA-256: 09a1edcabc13bb0fe4da57a63d8f88998fe4c851f9e358a0f961c0f77a068d7a
font_01_sfnt_off00011474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11474 17300 bytes
SHA-256: 0569380d96006ccf38addcef23b25fbbaf486acd3098ef4e2347840afbb959cf
font_02_sfnt_off0001416e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1416E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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