Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd219dabcd7293c7…

MALICIOUS

PDF

96.5 KB Created: 2021-07-03 22:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 95edc38751405d0e1e820b5ee506cea5 SHA-1: db6756ba0bb3607f07a9616d6f67880028d686da SHA-256: fd219dabcd7293c783eff557187cd1fc19a7f6e91a8ffceb2d54bf56c987c730
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded links are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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 http://coinproject.com/userfiles/image/file/82786506955.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608926adb1551---zanosenefob.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/e13d21f13015fd1007e316249cd45e32/21981903044.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/3cfd89a2d5658af5cbd5f94dc2fc2993/59272446965.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f81ff41a0---kifusetikukif.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab1c6528da---lijilejut.pdf
    • https://tidaksusah.com/contents//files/56224186508.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f692524ff1---besugawunutopilewuwogaj.pdf
    • http://careerdynamic.com/clients/3/3d/3d9dba0a3645e5854abf1db7654b9c86/File/94165960585.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/e6237ea760ca45e385a3f24d38305409/86055619098.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed54187b07---30155179567.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/d0b1c2f7fc3584b986bf49156e82eb57/pudabimifajolibabaxi.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/havggocslthicpqm8bvi2tbqa0/29953521461.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607523e1442fa---44051101089.pdf
    • http://computer-rudolstadt.de/upload/file/mekaje.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160836556ba215---90264142651.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2651674fe4---bemuluderefejujugup.pdf
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/9e1a481ae61e1098da547aa8009705ed/duluweku.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/4e036784ec5eab9319f2c16d8afa0064/nupuzijag.pdf
    • http://fitviewer.biz/files/file/zotunug.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/a9f6eaaf526a87ae7a2a0c1836c884fd/89654149238.pdf
    • http://studionegro.net/userfiles/files/fijusizorozajigepubixogi.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/83744422a614c134e5e972bea473af97/34152376467.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=new+practical+chinese+reader+1+textbook+pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6f4.bin
7c4ee19bece88ee71b5252fe72a5b530aa0d224669fef59adc3165c8fdd322f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F4 14804 bytes
font_01_sfnt_off000113a2.bin
0e63cdeb364587167b53a44677ed842548aade18ef93770db78a3485c3685627		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113A2 11168 bytes
font_02_sfnt_off00012d90.bin
c76473b48d5d99924e321b4cedb581f053b325fe6be45649d0bf67a06767bdd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D90 18660 bytes
font_03_sfnt_off00015be6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15BE6 16792 bytes

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