Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef86ffb2fde9a75…

MALICIOUS

PDF

85.6 KB Created: 2021-07-08 22:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7678c8330731584d50cbf3b2cb93de53 SHA-1: f815ab29170f625f33b56ee14ddf6c732f0c1d4c SHA-256: 2ef86ffb2fde9a75c1cff1f80100021bbe742e798ec64f6d3172fbd69d60c937
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://crysiq.ru/uplcv?utm_term=malaria+and+typhoid+co+infection+treatment
    • http://cs-web-design.de/ablage/userfiles/files/78772695721.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d890854e4---zarekidepadogatuwam.pdf
    • https://allmassage.net/upload/file/20210613155327.pdf
    • http://accronline.com/userfiles/file/devifuwewenawux.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/b362a2aeef9ae11d3643f2184d24deca/zinapujilabaxilub.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608188c619b62---69741168191.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0b2a8560---99701456554.pdf
    • http://aivieksteslaivas.lv/userfiles/file/silefawamujiferub.pdf
    • https://rendszergazda-cegeknek.hu/ckfinder/userfiles/files/rimajagikisaf.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607db19882496---gameru.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092857e183e3---kenugekarivibozipi.pdf
    • http://bioscipublisher.com/files/upfiles/file/29267994759.pdf
    • http://www.allatpatikapecs.hu/images/file/94153568898.pdf
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/73223675711.pdf
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082952b77c0f---punejubulutavobirus.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c43bdce124a---sanofesugexaxex.pdf
    • http://thaimassageboy.com/ckfinder/userfiles/files/wafimi.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/d8312ab0f9ff69ae5135a4c1b5d495ad/gilixumudo.pdf
    • https://greenvalleykerala.com/ckfinder/userfiles/files/tikewesujarigon.pdf
    • https://slaterlighting.com/wp-content/plugins/super-forms/uploads/php/files/95b41d6fa3f0b70f4606d9f75d4274a6/43286579633.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/d6b6547c1819d60c5a44f650524882e1/75835349488.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c409dddd42b---zekapanepuwivujosijo.pdf
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/lijazuwidapopoguku.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083d1d14efe1---nedufevukad.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/62507597fe31e66229688a839e46ec4f/jifofugelopafi.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7fa5e8863---lepuraxu.pdf
    • https://medlineplus.gov/malaria.html
    • 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_off0000ec61.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC61 16792 bytes
font_01_sfnt_off00010478.bin
780e20dbc58f5639b34a450378adbf4d5bd48ba9201ec38610f47851d492953c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10478 10824 bytes
font_02_sfnt_off00011d32.bin
6363dda129bd1f72c5d5a1a4ebeb4576172de3bc84f89b90bd17895a2aa7ec35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D32 16664 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.