Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0e10d7da539d62…

MALICIOUS

PDF

94.2 KB Created: 2021-06-30 08:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ad467390b26cb7ffaff79b63984e1438 SHA-1: 77b06e260f29fcf241319a337929bf733cbadd54 SHA-256: 9f0e10d7da539d6279c52386512b855f56cfc0c8e5da9cc2fef2adcdd042df12
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing or malicious content lure, as indicated by multiple heuristics flagging it as a link farm pointing to compromised CMS uploads and disposable hosting. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of numerous external URLs suggests an attempt to redirect the user to malicious sites, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/2d7b7bf3b282a7a061cb9c9810b9d531/30437796616.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d7773c9c087---94011801949.pdf
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41209607042.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/onu3ph2j085577cumc590fulci/81085709426.pdf
    • http://clarasonic.com/upload/file/nokakagoxeretetubefuwaxi.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16094755243cdd---2676879441.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/o9h8a5rsiejv5hmqp6pm1kar30/voluvelog.pdf
    • http://midel.me/userfiles/file/gamoluwogufudij.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9be6c1b39---84529725505.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/32fb6b83ba77737c6fab01fc3189d509/16367197270.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/kptf22v7tmi3qs2qt12pka28i2/bekagozipoxaviral.pdf
    • http://royalwedding.jp/images/blog//file/39639559294.pdf
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/75626725669.pdf
    • http://alkanboya.com/files/file///rajazuduxunedirokosutulix.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbd2046d1ef---buxuzusewezadusivaxu.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/c046498af6e7eb0676155e9edd973733/41008192008.pdf
    • https://syntellect.ru/Repository/file/24496376552.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/59f9c850186d3d16094bcd4f374db1e1/34736164347.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/zajoxajuwemo.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad5debc0d2---lodaberiwopegufowozedifow.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/tafrn7u6s9806g2qbf06f9te62/29150493645.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/76f243029721d15553cb66dc63b1ce02/renefixademesukenerokiw.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9f690cc374---fozoxawonugufafofa.pdf
    • http://fitviewer.de/files/file/22821610480.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/st3acs5tmpfaptlbo54d3ns252/nogukenigonatezedubagiz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=cmc+joints+of+fingers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b70.bin
5b1cae7a5a67cfdd2d44eed482997d32e6f19b6dcf335c4682bdcd8f447e9601		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B70 18328 bytes
font_01_sfnt_off00013b3c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B3C 16792 bytes
font_02_sfnt_off00015353.bin
662086b130958994fe7917d025dab5f7a3a1f63b3fb602af20e76e9c3ede655a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15353 10632 bytes

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