Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd960eb1b221127…

MALICIOUS

PDF

90.4 KB Created: 2021-07-25 09:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61e2d692f9d9669e5373aff0f0228735 SHA-1: a129121330176b3549b648442f4068df90a8947a SHA-256: 1cd960eb1b221127cf6495abd0a84e015167da8171dc93d1abb77ed87b59dfba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many of which point to compromised WordPress sites hosting PDF files, suggesting a link farm or redirection scheme. The presence of these links indicates an attempt to lure users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d385e77b7a---91707818086.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/mj8633kes0sggognnc64dpqrj1/pokugixugojebini.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc937a7f36c---75520741067.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24ff605be6---xilibifinekarojodat.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160972e377eed4---kezedikiwedozetos.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/5qn23f8p9k9lrp5f884k9anpha/6574473531.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/9307b78b571d4a481e7e032e18c3d66c/juboladoz.pdf
    • http://4bzsoftware.com/Images_upload/files/33617491562.pdf
    • http://koryosushi.com/uploads/files/83342719763.pdf
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/smp84oo88d5ab4tgth4n7dc405/kijisilaximenalubiriwixal.pdf
    • http://hibertek.com/image/files/20210716_210254.pdf
    • http://polskienarty.pl/data/aktualnosci_imgs/file/bejugavoxi.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883e9643451---wejemizunimikilezewu.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16087980b7381f---67739777421.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3e6b09571---95814636255.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2eb01a6757---pudolagum.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcc9ed94f4---82474259814.pdf
    • http://girisimcilikproje.com/resimler/files/81874462988.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771331b6102---rapomafasopuzox.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607206c281fa7---narude.pdf
    • http://provia-events.de/pics/fotos/1/file/49717751579.pdf
    • http://varadimasszazs.hu/uploads/files/21109850453.pdf
    • https://zionapostolicministries.org/uploads/file/84169881561.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/29ed29b4931b7921f196a0c4ccc2afe6/6369622709.pdf
    • http://studiorestagno.eu/userfiles/files/54930584338.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/sql96t1kqo5j3ek50hfau7614r/ponifefeletiwugu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=kiera+cass+the+selection+series+book+order
    • 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_off0000fca1.bin
28c823708d81d594e24c13d4eb255dd9bca166bbca16b48fda76026224b92a6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA1 17416 bytes
font_01_sfnt_off000129c9.bin
ac26bcf0cb5178e5a4c727c5afab813bf9b05279d16d3b6ae299cce7b7be9470		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129C9 10688 bytes
font_02_sfnt_off00014237.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14237 16792 bytes

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