Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c04f6681320a07…

MALICIOUS

PDF

74.9 KB Created: 2021-09-06 04:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 10d2b1d90611ff321d309f2435776dd2 SHA-1: 48080b8a18437c324cb7096eec07fe81d93bd776 SHA-256: c7c04f6681320a072f6cecff8fc677d54daeac154e0eaf936e933d7cac5c1c94
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9d40d3018---66271989822.pdf In PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/e0bf643235432a25e52b376db897e11d/52362289757.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/6398449139.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/rjors5e9h1au503n1572h6ie0s/10476861829.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/69894209244.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/18136235865.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d37ece42c3---mexejegidogezosuje.pdfIn PDF document text
    • https://familienbilstrup.dk/ckfinder/userfiles/files/rutewefaguliw.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/f8rbafqjel10onthvr2vd28of0/35634156295.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/84245899621.pdfIn PDF document text
    • https://fratellifurloni.it/file/xidokixizaruzalenoroguta.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/968b076b938db2e0a2a0a80e3ae605ea/romevekuwijonesaninage.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160987a3498326---75221397071.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/94f5e8edcc187f7f04e2ee9a2caa3566/66239752579.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/vetopofufoxugemuzaxizafip.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/xekuxabaxora.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/sowosilovuramoto.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/23f72faab15ff77429dcf27596cddc1f/94147196114.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/vuzobugigaratiwukeboz.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/1cce465f9970a011eb2c35e16fb956e8/miduzozipuresutaladaravov.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/bd43372caae18354b430bf084c79a540/88058816184.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/60e34b97c12aaa8f73b5cc87bcd360c2/sowoxuzejeba.pdfIn PDF document text
    • http://mahkotacare.com/tmr/userfiles/files/madeduzebukiloxamosovin.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a75efa655fb---4343996932.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/38090844970.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/vifagufusizuratogo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=pdf+reader+apk+download+freePDF 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_off0000c305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC305 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1C 10312 bytes
SHA-256: 5ac55ee3bcc34739586a838c65ad708a2f16ebb370b705c700ad03370ea7e0de
font_02_sfnt_off0000f281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF281 17044 bytes
SHA-256: 1480ed176a642ff2cfea88c171eb11feee1de275ac6b350b0314bb72b5e84a4a