Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89c552191ab5cc6…

MALICIOUS

PDF

91.4 KB Created: 2021-07-24 03:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 6c90caea9c04118a3580b9b01e389d3d SHA-1: b88856f0a0fed6a147a52cdcb370cd2f96b960f2 SHA-256: c89c552191ab5cc6516a68fecc841c1d542d2e35d2ed340ce22dc8417b0448c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to lure users into downloading further malicious content or engaging in phishing activities. The presence of multiple links on disposable hosting and compromised CMS uploads indicates a deliberate effort to obscure the true destination and leverage vulnerable infrastructure.

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://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1772b1f42f---25811926193.pdf In PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/80a663701f728c8ceeb8a6d97089c678/13255922625.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/vodinove.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/66440868422.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a779a6adda5---ronuzoguririrulemap.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608613169e62a---37762442876.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf0ee2c187---72086090398.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d94609be16---65836113198.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/a3b04a0fe757bbc32eb56887e963cfc5/62219837801.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/wudidexenuka.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7059dc9c80---wetavidedafufo.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160738a13b4a78---74904543525.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/a4d2e3b56b6887aaa74a8746cc4e3c7b/wigudatadofupoto.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/57441168541.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d983bb9128---rixekowiwedazudezofe.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/vuponifejapejuxo.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/xolixovorirujer.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab9597f7bf---65335029442.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fabfa58cd0---23820231863.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/pasoxulakufugirosido.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/ao952glnvnk0aok1dovr5ga1ni/23861768315.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/t7ukar0lh8if580jdo4t2fg0q2/6313663086.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=mlb+9+innings+20+mod+apk+5.0.2PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC7 3072 bytes
SHA-256: fb211409fdcda0b76ef863396fd94dfa7cc8fc18b25d99d74078347b61a2fbbb
font_01_sfnt_off0000fc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11434 18768 bytes
SHA-256: e5af9ca00b761bfe7023df910c7ec57b28ff1128f87bf075cc5e3eb8528661a4
font_03_sfnt_off00014516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14516 11240 bytes
SHA-256: 45f82a032bc8bb74032181e6a913d1eaa250e01ec4abebe5e014812e8b332ee3

Open this report in the interactive analyzer, or submit your own file for analysis.