Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca45d2514d0ccdd…

MALICIOUS

PDF

71.3 KB Created: 2021-09-05 18:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2a7355006c18269c063828e47048aa78 SHA-1: ef9880d29f9e1ab330af0f9dbcbdcb2549fd704c SHA-256: 4ca45d2514d0ccddca8e9c963382b7addfc72728b1baadab64d53dd44344f268
176 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. The file contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of an IP address literal in a URI further supports the suspicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/pppn574b75s5rd18dv9fcri8jn/63682538974.pdf In PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/74068251120.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/17387473439.pdfIn PDF document text
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/29213325546.pdfIn PDF document text
    • https://sbufficio.it/file/51983577483.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab8b3e603e---10096352777.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a47a883a2---nojakamidugekoworo.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/95584671610.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/f582896c609bacc3d6e7096001d1b6d0/86939034067.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/64212651516.pdfPDF link annotation
    • https://tahubunting1.com/contents//files/gezuzoretukixosovekepik.pdfIn PDF document text
    • http://93564497.com/userfiles/62598466728.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/919kf1ul2h9l4100ei51bvia87/puzoze.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/kujefelaj.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dfb695a30---65399871081.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/zivulajajavovokuriwal.pdfIn PDF document text
    • https://estoniapools.com/contents//files/16093487444.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/19235971351.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a75f6a7f2---savorimegu.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/3578814138.pdfIn PDF document text
    • http://www.proyecpapel.es/ckfinder/userfiles/files/41098212521.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8b8ede962---mivav.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/4969690459.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160958846810b0---lonenizipumodixome.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+love+yourself+again+pdfPDF link annotation
    • 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_off0000b7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFE 11032 bytes
SHA-256: 5cdb823a6ae4e4b661a17e1a6e0c74b033caf6ae5690c0c23533479545c21b48
font_02_sfnt_off0000e999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE999 15004 bytes
SHA-256: c197d7ee7f4ef7d1bf0ae04e5c1f99398d781a6319e301b640b6ab1d444fdc4b

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