Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a475006947c6ad8…

MALICIOUS

PDF

73.7 KB Created: 2021-07-25 00:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0284ed3758d203b9ff7c890fd513111a SHA-1: 2072b8be549fb7655b986438e9072e3e455ef7e6 SHA-256: 2a475006947c6ad8756139532815bcbd47fb64704e74ae1d8a233e3eb12bd5a3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting. These links likely serve to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://planet-pvc.com/upload/files/zavuxinamam.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/c74b64491d687fbb249746be68321b8b/74839317370.pdf
    • http://jocoseatee.com/userfiles/files/mepazufiku.pdf
    • https://magatek.com/documents/file/rijebumipoxolejafonu.pdf
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53042736857.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc1ab924006---59538560620.pdf
    • http://iglozawiercie.pl/zdjecia/file/92112582902.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/21ab22ad2bda7785ea849c418e5a1013/25529407802.pdf
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/kaximafovi.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/ef23b79216c29ce86644810bba5ec8e8/xokabifozazud.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091c7464357b---76762057247.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a101e4d5ac---xofarixibesegav.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5095da5dbd---73926958750.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/1bbee489afa03a30da93915c6ae1c96a/lakigud.pdf
    • https://ikima.fr/uploads/file/59574058781.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160acf5902fe15---wizewizanefik.pdf
    • https://cleanenergy.mn/uploads/files/rozirimeri.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfc1c1875d---73275030462.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ce79fe440bb---74539209100.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/r8ejaoid0bjkuv2bl1avqm76b9/zenewam.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fa9d25a8c---jerigipoxulafixopu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=fahrenheit+451+study+guide+questions+and+answers+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf4a.bin
6d55794c2a6b6287dae555e90f239f36dbe2ea706e9480ba14b1bf8307a3d952
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF4A 15028 bytes
font_01_sfnt_off0000e5b6.bin
81b0374758468c8133b027f2da89a18bd95d3876251ffb9022890c37ad18eb0f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B6 11416 bytes
font_02_sfnt_off0001004e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1004E 16792 bytes