Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef5206b744366b7…

MALICIOUS

PDF

205.1 KB Created: 2021-06-26 16:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: a523a13cd0aafedc9ccf86ff9231323a SHA-1: 568d5c337d9cb33cc0b81eda4e34fce96c3e60d1 SHA-256: bef5206b744366b7139050e8f5f53595c125cf3b3a2ba113ec0e0fa9bfa58fb4
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, with several pointing to compromised WordPress upload storage, indicating a link farm designed to lure users. The presence of a high-severity heuristic for 'PDF_SEO_UTM_REDIRECTOR_LINK' further supports this, suggesting a phishing or malware distribution attempt. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95'. No scripts were extracted, but the overall structure points to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://doggystylzgrooming.com/admin/photos/file/51685103355.pdf In PDF document text
    • https://patriciobanados.cl/upload/file/In PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962e6c50f72---69106963142.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/a1385ec5283fc4919e28be21aac902a3/53609781723.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/lolokugudibefoximisa.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091abecba596---61905183892.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210619_BE2DE1B2B4DD7A2C.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/cd1ea99984f7171cd0c4943ec3f9c62d/72148103134.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/snpe6f8pd5lj859jjco5n0q8d7/pafedesezavurupifedof.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/67d9036d21b9d1fe7d672763bc8b2282/zavevafax.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/tanogofemifefusedunire.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160be33ffbe605---kotubuf.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/dikesepuwibagili.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/d91ae9d41ea8fbf83831a9d213919dd2/dumizerevixapuxigudone.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083b76345be6---20427018607.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160cfcc19635b3---86596604762.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/sirubunekurawewefibaki.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/ufne01f08137hbiubo5sf7u8f3/zerirebiva.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/aa3ee4uehpti8s7cnjiqukpgk1/doweluzufelapo.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/xoveji.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/sakiluborejetanux.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607579195c6a0---58909212735.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607163317cf02---rinevilipelinozamezuzeto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=word+link+answers+dailyPDF 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_off0002cc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002e43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E43B 10428 bytes
SHA-256: 3c444ffa9772f7c4b19108133dc59ff39b0c9edb9a115cc1528bc379baecb425
font_02_sfnt_off0002fbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBF7 16392 bytes
SHA-256: 9c4235166e8eb13adf6d5974f801e8914583ced852f6b81f56990fcc561e3fb0