Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eeac4ac0dbfe2ff…

MALICIOUS

PDF

84.4 KB Created: 2021-06-26 05:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1392ddb4d0ec415b30078a7f4fe338f8 SHA-1: 959fe788226d677b6e655ba9b71a5c6e1178d3c0 SHA-256: 5eeac4ac0dbfe2ff5c1e6efa5631d764dedd5b84463e529b180647dfea11240d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. The presence of numerous links on disposable hosting and compromised CMS uploads reinforces the malicious nature of this document.

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 http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/f9c7b726b177a0ea91de1bb570f723ad/23751782067.pdf In PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/u5gccvnjhtun10bqd532a5m1ub/gumasekupusojav.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c76864e66a---71029529912.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/5775b8da266725fd2599a09bc024cc89/nelaj.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081cb3e7eb68---xexewoje.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a091b5521b1---gixijulexufufomav.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/95697450817.pdfIn PDF document text
    • https://maturana.cl/upload/file/47119175330.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/7a76909830f48b496358a0087dd20629/pekumabi.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/90894095475.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/21063501675.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/88670165618.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/neteloxabatogezafijizikuz.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/a5040be3e369948ea32969d822c251b9/51709732247.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/474bdaa2c8d0c03ae07da92f9f089426/sotosavuwodatagevogomejaf.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1623090634.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca770674f8---74552661126.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/f2ac53e12e84961510f7ebc96f00dd71/pirap.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608782e3950c8---72397147521.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/7889689310.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=best+trails+near+mePDF 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_off0000eb24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10336 16600 bytes
SHA-256: 8628f46a5df326e4be8fe6c3076ab505e127a0b404061b35683033865e811386
font_02_sfnt_off00012e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5F 10204 bytes
SHA-256: 30a08bf688b6e9e715167c65c612410d00cd73868c4d579cc956db40aa3a2492

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