Malicious PDF — malware analysis report

Static analysis result for SHA-256 1562dbfb22930c96…

MALICIOUS

PDF

85.7 KB Created: 2021-08-07 08:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3f619e972cbe0bda818540d8076675a6 SHA-1: 9d1203ee1942c23cdab1b03f7508035fd6d9ef6d SHA-256: 1562dbfb22930c964e379160e6d0662c154cf224a8693a53d57c8e89499c8092
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm or phishing lure. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of numerous external links and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a pattern of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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://smidgel.ru/uplcv?utm_term=what+appeals+to+you+most+about+this+position PDF link annotation
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/a90c62ce5ed7882c8b611e52d7f5d6ba/dinurawabosagozejerix.pdfIn PDF document text
    • http://hyundaihungthinh.com/uploads/images/files/gokadu.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/zotoxubatezori.pdfIn PDF document text
    • http://poorclarescork.ie/images/tofowuxuluxotumij.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/bifukanevojajiridozok.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/buxamoduwojopetaxug.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa49956db3a---bidorexubedenotisuw.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/xenixuxategemofajizoz.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/c973008d6673006656f2446cbd90fe54/816215743.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc438e1616---82661791106.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/2b6a63174479c38326dfaecd22c14a9d/monolerogaxixatudezug.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/838692b67a818d35c25269787b653d03/31792395305.pdfIn PDF document text
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/jewaruvufamu.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f68610618f---16193415666.pdfIn PDF document text
    • https://avayemehr-carpet.ir/data/file/dawigokatetaxinerasipisu.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/36607479955.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/da9c1d2592bb073767ff43a71c418faf/76442785697.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888bdc68273---24055643985.pdfIn PDF document text
    • http://cadeco.com/testingsites/advantage_aviation/assets/media/file/noluvebitajuv.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/93080435874.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/tq1ulvaipplfflt5mluhc81rjj/19403868385.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e57ec8bce---nelitedasem.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/c4c49839eb8afcd979d05c199b4a2ea1/50217447686.pdfIn PDF document text
    • 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_off0000eb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9B 16580 bytes
SHA-256: 33721ced156100189f0beefa781d3064644d753bfa2420d78adf612fdd8739ea
font_01_sfnt_off0001167e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167E 10764 bytes
SHA-256: e7041ba4ed0028a403e4abb47b18ca4751c7d76b64d93eea7976952f4bea580f
font_02_sfnt_off00012ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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