Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa160f1187a37951…

MALICIOUS

PDF

90.2 KB Created: 2021-08-08 01:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 03da1691a50a7c3ea0207fa2ae6f2817 SHA-1: 3f51b6022cdc705d332491a862672e271f39caa1 SHA-256: fa160f1187a379512d5b4081b3b732e26b60f222d3bcff3a296de4aec4470f48
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external URIs, many of which point to compromised websites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm, likely to redirect users to malicious sites. The embedded JavaScript, though not fully analyzed, is a common method for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://riversedgefm.com/files/file/77173019183.pdf In PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/c29e5dee21b2bd2535e0b25f72e96d98/28573511253.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/dufamezapodunemaji.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/qrid6r50c64lvtfh0iongt6b77/75596750975.pdfIn PDF document text
    • http://plenaseguroseprevidencia.com/fotosempresa//files/kafoxefab.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/edd2cec04e76d0b63a7476eb5b18a343/68015883155.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021060219284888.pdfIn PDF document text
    • http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/nokovazewasebedatesuk.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/texakexowuxasidorogidekek.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/3f32f646d9aedab866dadc448caa67d9/dubofuvafixemurifo.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbee36b1c3---4815983088.pdfIn PDF document text
    • http://mebco.ru/images/file/nomemubezenajawin.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607924d7b5911---tobibabare.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/43698321830.pdfIn PDF document text
    • http://pazarziraat.com/userfiles/file/81557579170.pdfIn PDF document text
    • https://loctra.net/userfiles/file/88521740252.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160c41590d4640---6186714208.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5fa97b794---sanosesulekulitagamido.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/8coq6nuoejhcrh4t9mgeitg9r7/42479129198.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/1e4f0748bc2933e685bab824602b4bd2/71173467234.pdfIn PDF document text
    • http://nmglyxx.com/userfiles/file/57957293839.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=mujhse+dosti+karoge+full+movie+download+720p+filmywapPDF 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_off0000f48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48C 19020 bytes
SHA-256: 227afd13ddfb0c9f009b240b8730ba5b9d9f542fa4f22e6099132292e9cb745c
font_01_sfnt_off00012576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12576 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D8D 11816 bytes
SHA-256: a39def9c9255e0ad92c984b84a10e2867cd8306cca7ee912aaef190bcab86513

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