Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ed6927832fed65…

MALICIOUS

PDF

80.6 KB Created: 2021-09-12 01:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c3afb118437034a632cb0ad168df1e6e SHA-1: 4d37876b5f90abeab91bb5fbf0cef685594f53c4 SHA-256: 47ed6927832fed65630e93809e99b2be8c37ed9ca363f94b08bb1f7c2f128de5
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The document's structure and embedded URLs strongly suggest it is designed to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://nomylo.ru/uplcv?utm_term=where+do+i+find+sms+messages+on+my+phone PDF link annotation
    • http://cuacuonanbinh.com/userfiles/file/51726672710.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/32249904397.pdfIn PDF document text
    • https://digbijoynath.in/uploads/userfiles/files/vowikojuvatudaziv.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/846fc64bdc91ddcbbc9153d3957506a5/42580821862.pdfIn PDF document text
    • https://novsport.com/content/File/76795871816.pdfIn PDF document text
    • https://totounited.com/contents/files/5462651045.pdfIn PDF document text
    • http://kahasat.cz/data/file/vowuzumavemulurosodago.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/5349094333.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2fb039579---48359982741.pdfIn PDF document text
    • https://gedayapi.com/userfiles/file/36470677986.pdfIn PDF document text
    • http://askaudit.ru/price/kizisozosatikek.pdfIn PDF document text
    • https://lensmam.com/userfiles/file/zukokumivikupalinej.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137fd205696e---digosuregowi.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133a074e18e0---45522943597.pdfIn PDF document text
    • https://majubesar.org/contents/files/tedozozekeratibubipatak.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/53782925048.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/88347790584.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/52033095717.pdfIn PDF document text
    • http://talleresjpg.es/img/file/tawosezozadobulu.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ee6d03125---33819228568.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/kirupu.pdfIn PDF document text
    • https://bimore.vn/webroot/img/files/zejefumibe.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/90717269809.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_off0000d5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 17808 bytes
SHA-256: 03e267dc46695920d0050821c707286303265ebd9385546910db1b58fee0cef8
font_02_sfnt_off00011c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C30 10908 bytes
SHA-256: 7e02438273a264971229d3831a56524d07d50d1b47f3f857b3d056efff839fce

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