Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e60f17d2318caf7…

MALICIOUS

PDF

71.9 KB Created: 2021-09-17 23:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1b2828f9aa090f2c883bebdddb918a7e SHA-1: 5310ceafa7e63f95f8dd92755cce60d54f7d3b54 SHA-256: 0e60f17d2318caf798caf9657f2f417a7ba525d7a123212f8aefc6b87a923315
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting. The ML classifier strongly indicates maliciousness, and the structure suggests a link farm designed to redirect users to potentially harmful content. No scripts were extracted, but the presence of numerous external links and the ML detection point to a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://oniceh.ru/uplcv?utm_term=nightmare+in+the+dark+apk PDF link annotation
    • http://sm300159.agchost.com/userfiles/files/rajali.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/lobelazu.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/61c2b7a8e84b1d566536f08ff08d06bf/8123816017.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/87225711811.pdfIn PDF document text
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/kebedutiferegorixafov.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/5739160812.pdfIn PDF document text
    • https://network-italia.it/file/48493148408.pdfIn PDF document text
    • http://chayka-svg.ru/files/gotijusenirow.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/91413474073.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/gukikobuvemogaja.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613584f1c4f4f---85821860650.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/zubewipuzakezinuk.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/jotokexifoxinaparefor.pdfIn PDF document text
    • http://dream-mebel.com/pic/file/94429933252.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0b2b62515---31915766796.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5f8b6c388---pizekep.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/sivumixugiruvixetotulokil.pdfIn PDF document text
    • https://binhvi.com/upload/files/xiziwasuzajusu.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/27665596781.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/161324b5fad518---81500861691.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/32127279914.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/68878908236.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/tanoleruzifewewilizew.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/80624228938.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/65934046256.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/xifegivemef.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_off0000b9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9A1 15980 bytes
SHA-256: 77906ecb4d6bf6119128eb08de4c024750f3115aa6aa5be86ac0a85244238a67
font_01_sfnt_off0000e253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE253 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6A 10572 bytes
SHA-256: 44f324b3a711fc9731a00aa4ac53eb364f9ceae575048a817902f59f89449af9

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