Malicious PDF — malware analysis report

Static analysis result for SHA-256 0417f4b014afa4ee…

MALICIOUS

PDF

86.2 KB Created: 2021-07-13 02:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 69e9627e1d1415e058217ea7b334b31e SHA-1: ded5748a98af88058d0f6b730fb39f6dc2f80a3a SHA-256: 0417f4b014afa4ee1b36589e71d92660406280465e2a6fcf89e099ef6c622fef
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 a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The file's structure and the presence of many external links indicate it is likely used as a lure to facilitate phishing attacks or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://medvor.ru/uplcv?utm_term=can+dogs+be+declawed PDF link annotation
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/0377de451627310fb51af4648fe9e567/wixokuxupejituwuvupuw.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/45384407262.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/75963658505.pdfIn PDF document text
    • http://lhsclassof68.com/clients/73441/File/25392404914.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/kuzezosavavorakesebavoj.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/vickpdad5rqs0da52on550snl1/78516762006.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/xakemuferubevofasezilosof.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aabacb2f3ce---wexawamedajutixu.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/e9q5r64hvd10mlni4idsbjkmg3/32200577844.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/1a3bc312c766aa4b456124550fdf2a8e/93860089402.pdfIn PDF document text
    • https://successalpha.team/upload/files/12175616112.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/kemobawetetafejo.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb966c03905---mikejufo.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/40e8d324cebeba8b7a4cacccad354b32/takimejimaxedesurum.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c08f8201b4a---pebewutev.pdfIn PDF document text
    • https://andrejc.si/files/file/44074449245.pdfIn PDF document text
    • https://unicornccc.com/ckfinder/userfiles/files/janirewowedij.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/52208740952.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/58f2a8a7cc8bb83fb4ffded408252daf/sepigeke.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/sasexovevatufetikumazasel.pdfIn PDF document text
    • https://www.pollackmihalyiskola.hu/ckfinder/userfiles/files/xumepewibutiletadexoje.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/bekonumowodukoki.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/pizopimeguxiwagitojinotub.pdfIn PDF document text
    • 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_off0000f09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09F 10512 bytes
SHA-256: a704049997764aca6599ead8e2f5c876308d263bb2be46db2d389e6db2be6ccb
font_01_sfnt_off0001088d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088D 16588 bytes
SHA-256: e14a2d85824b42dd60744bdc63164909281ed6513161b2c55991f59320c375be
font_02_sfnt_off000133b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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