Malicious PDF — malware analysis report

Static analysis result for SHA-256 67447d4f7c60a52d…

MALICIOUS

PDF

77.9 KB Created: 2021-05-25 08:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: fa4100ccbf2e0ca6d4bf5cd3844569d0 SHA-1: 39f68e3c895b2d052b881c3ae11bea80cd5c6196 SHA-256: 67447d4f7c60a52dc9e8734923bfb6d1b8a33853a9007a01d41d2db83a293641
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised websites, likely intended to redirect users to malicious content or phishing pages. The presence of multiple external URIs and a link farm structure suggests an attempt to manipulate search engine results or distribute malware through compromised hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://anandtouristcorporation.com/uploads/tugukabe.pdf In PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608d65ba953b2---xufusifigetapoguxuvux.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/2ca211992b5d4b66cacfaa660822d094/1387590642.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/jfmhpp5jt1vimjs7mhu4msabqo/2709634978.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/3c812bb6ab93bd4fadd6784251034aaa/89310411824.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/xuzesajita.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/posazojelevutuful.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a740ee90881---88046961283.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/9lm90qtoioevdl0bjg23dev385/37593424670.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/728a45596151f793fb592ee2d89fc590/witobinotik.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210521174246_234556095.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/bb18e4a955f44ea54be80322061ba4e5/6059201489.pdfIn PDF document text
    • http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/1bht0ur66fai8k0fiaia04jeqv/81212144902.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcf4f7f1d3---lefabudafadekije.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+use+a+bottle+warmer+tommee+tippeePDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A9 4936 bytes
SHA-256: b4b9b2f781098a168aa087f5934b6faf690e7526add2a7a5b914dd1713ed62b6
font_01_sfnt_off0000f77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77A 10864 bytes
SHA-256: 68836940b820884823dabb9cc295c97780d78e07102a261ee8e8e76a757d0145
font_02_sfnt_off00011c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333