Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a6b144e2a2e627…

MALICIOUS

PDF

85.6 KB Created: 2021-07-15 23:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ca47abf5b67798ca4145b377fbd6a258 SHA-1: 15096ff180f3e0fd22a8ad6371f6513a9b5d455b SHA-256: 16a6b144e2a2e627f126ad3cb95e4aeea6e9efe8ec71a762dd0eae0e49318241
176 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of a raw IP address in one of the URIs further indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/dfffa309877fecd1f622f072129f7f1e/bagoburevozarisewajuzan.pdf In PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89e2a64526---feravobomanogofakorozalad.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/32786648052.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088049281d04---tazanujafupiwat.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8d25b8dc9---18764299358.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160cfce14d2465---natebib.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c44568e34dc---87081229018.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/tcu0f5e5t47qtb7lp4i4iot2fq/vonezunisudanefavaka.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca219646d3---junexomatakubopujunibox.pdfPDF link annotation
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799ad59179b---wedimelefutazeruf.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/0041a586a80aa2b719c9de1411221ebf/65915509025.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d63ed1b558a---dudodazesasibifitinisawir.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-5/file/wafadidanivexefaj.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/zeteberivojadada.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/c244502c8853d11356da5cecf7050e01/rekez.pdfIn PDF document text
    • https://hirurgija.me//files/16344367553.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/21805cb50902b2c2de108a37ad2004f8/tudikalokagux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=spotting+and+no+periodPDF 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_off0000ee2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10643 10428 bytes
SHA-256: 1b278bdf4eefb7da44a49cb6888e4681f8b8a0f497692900f02b673ffe0c8814
font_02_sfnt_off00011dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD2 17004 bytes
SHA-256: b3de2e05d83f88ba6224af61fc41d16b18b59f91c53caf5240eff86067359203

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