Malicious PDF — malware analysis report

Static analysis result for SHA-256 5caca15e26632b54…

MALICIOUS

PDF

84.3 KB Created: 2021-09-02 10:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bc6e7dd925c14e830c8ce636042ed2e3 SHA-1: 0ed017285b4be9180a2373f14ba03018a61e23f2 SHA-256: 5caca15e26632b5483332de097441fa79a8eaa056260dfcd0a4e5aeb37d70dba
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised CMS platforms. The presence of multiple distinct hosts and the use of UTM parameters suggest an attempt to manipulate search engine rankings or distribute phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://oniceh.ru/uplcv?utm_term=basic+computer+interview+questions+and+answers+for+freshers PDF link annotation
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/1g4cmfffk3eg9i6bh9annbeg7j/73853069923.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/0ii2mgbhdl651pqdkinjnu4chq/pijigoguno.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6ef485ac6a---zedififujewet.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/59475802143.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/tutaziguwerek.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/ql7nntp1f3ioqo374m2mootc02/fojadu.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/72ca94d3d7689abf5079a35e6e85165f/jigebobabiri.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/xotituwozitibuzadubozo.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/87514305794.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/41642813744.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210707_C26C2BDBAB78C925.pdfIn PDF document text
    • http://www.eventoptik.de/upload/files/pugomurawujeziter.pdfIn PDF document text
    • http://lachina.cn/upload/file/74888681958.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/38596085510.pdfIn PDF document text
    • https://groupunsur4.com/contents//files/pipurizakugugumumij.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/tln9es83vvr5bpspkmn36ifpq4/61204428636.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f33f29df32---40920141227.pdfIn PDF document text
    • https://alutat.com/data/file/23033836966.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bd586f8b043---wijebewozemozewili.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607044bca2707---visokuniwolenaje.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160793bf08fc04---86016966149.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/degodurunulibogijexunovo.pdfIn PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/8868229700.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/migiropulikem.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_off0000e036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE036 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84D 11288 bytes
SHA-256: 4871ca5a0abc57a84484dde14e99b5bfb58b8e748a9ff807f248b5baba3274c3
font_02_sfnt_off00011280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11280 17548 bytes
SHA-256: 0b89fad079b2b52b18f652bde19e71122e6397022837e37f02e271bac83e218c

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