Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fac10105285e937…

MALICIOUS

PDF

72.8 KB Created: 2021-09-17 03:37:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7284db0b7afa539369651db2bc2016d4 SHA-1: d7c9c139fb19b8c8e6fb33cb291b586b3ce80ea8 SHA-256: 2fac10105285e93751703a410ec6fe2ccea336a3cabd2ccfb4a9b8dc3523ff20
156 Risk Score

Malware Insights

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

This PDF file was identified 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, several of which are hosted on compromised WordPress sites. The primary attack pattern involves luring users to potentially malicious content through a collection of embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://economiadecomunion.net/ckfinder/userfiles/files/68866827008.pdf In PDF document text
    • http://speckrepej.com/upload/file/mugetixutowave.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/54698350586.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613fde116b8fb---robuvexakuvozo.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/hl8dnkueja0575upa4d7ce4t1g/poxowu.pdfIn PDF document text
    • https://herfection.herfection.tw/upload/ckfinder_temp/files/20210910102220.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/c0a084a8af6aa9f70333fc02abdf9834/bemaw.pdfIn PDF document text
    • http://groupelamiri.com/uploads/FCK_files/file/pidevegos.pdfIn PDF document text
    • http://centrons.com/uploaded/file/1858259467613d941b20b5b.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/47792510586.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613f776313662---desowupuvo.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/wafudijaporokex.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/2259485443.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/fokutibolidakiwenuxilepe.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/39d7432dbe420f5ca07038ff8f093b65/pitetap.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/toporema.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/savilizanove.pdfIn PDF document text
    • http://hoya889.com/upfile/files/20210917000243.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142fc3357ebe---41005810391.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/40060034909.pdfIn PDF document text
    • https://yogaspotny.com/userfiles/file/lawapobedig.pdfIn PDF document text
    • http://www.chubsorn.com/file/files/vomivaduparigobume.pdfIn PDF document text
    • http://kingkady.cn/uploadfile/files/32798072576.pdfIn PDF document text
    • https://at1apigroup3.com/contents/files/88684719734.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/nedubemapagajawisiledura.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=20+ka+square+rootPDF 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_off0000babd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBABD 16836 bytes
SHA-256: 0e5366518ab0decfc947a3d2c440a2937ae34c75688670951b6dbbdf48a1727d
font_01_sfnt_off0000e5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fdeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEB 10340 bytes
SHA-256: 7dd266fd2aa944b132870779d8700637ad66dde118efe47d87a48d8b9380a916

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