Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f201d11364ab17a…

MALICIOUS

PDF

78.2 KB Created: 2021-07-23 23:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c7aaa7da78ddf06944c7b6c618c24afa SHA-1: 7bb04916b54cfd6fc5cf70c44b863ca2a2ad2a96 SHA-256: 4f201d11364ab17a087bc01344fe0a75819599a16063595dfae6d0ef8f2b4b1d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous external URLs, some hosted on compromised CMS platforms. The document's structure and embedded links suggest an attempt to disguise malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://uptownfallschurch.com/uploads/files/33206282028.pdf In PDF document text
    • https://dintek.eu/uploads/file/mebivakadabikewosojodagav.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160982bf71be10---42452802064.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/68222353354.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/a91e5694c303cef661b3465a6e253102/vupakaluxokafivalepiviran.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/pibosokep.pdfIn PDF document text
    • http://szpk.hu/_user/file/28147712075.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/muvejunabikozisotuga.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c51d7f76d2a---23121883940.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/legaje.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/sasufizumofadalegenisuj.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/71104479287.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbbe91ed13---biwigovefamov.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607541b923e03---98298199503.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160788ff67426e---20818360386.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/0345f9b157c6efbe30c87e028a52ae0f/bovanot.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098450827e5d---45809887502.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/vuwufugutumef.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/lozadut.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a608dc4f0a8---56266786995.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/ramosowegu.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/refumetosolesexipazuvix.pdfIn PDF document text
    • http://vinhthuan.com/upload/files/tavofiwozegetapenawane.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=origami+star+wars+millennium+falcon+instructions+easyPDF 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_off0000cd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6B 16624 bytes
SHA-256: 2f2bb5883aaefd9c0142b55d95d30b3c0915b6eb1860c0ec7302751d5fc54cdc
font_01_sfnt_off0000f8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C3 11004 bytes
SHA-256: 464c6908b8c1309f8663a911d907c32f351d8c5880226786fa4c3602a3782915
font_02_sfnt_off00011276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11276 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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