Malicious PDF — malware analysis report

Static analysis result for SHA-256 194cdab1cec91842…

MALICIOUS

PDF

214.7 KB Created: 2021-06-27 08:15:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 61da9da310c194f4df3b60d2895bced3 SHA-1: ba3fe30949f8488140c4c679843d75414b579f9c SHA-256: 194cdab1cec91842558e143ed2cb9cd11477921e3bd5d039080d4dd009307303
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits malicious behavior by employing a link farm and SEO redirector, as indicated by the 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristic. The primary lure directs users to a compromised WordPress upload storage location, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

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
  • 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://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e23dfcbe21---86798265278.pdf In PDF document text
    • http://dichvuketoansg.com/luutru/files/54920778641.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2f84419274---28176079369.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/sivuwuxupevek.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085e8c7c658c---3176142675.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/28097754515.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/a8205d08f7d78c8b13b759048e49a577/jovobezelili.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/b3fcd933d2501243aeef612f7d98465c/bejanadi.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075982866e37---sezepofomoki.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160824816834b3---lusuna.pdfIn PDF document text
    • https://ventadeterrenosurbanos.com/userfiles/file/38083725574.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/6q34809j8ouuss0g3uacq73q21/90110384446.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7da413ddd---69151724055.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/xononu.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/682ff251fb89fb08751a1cbd1a221596/gezeveletopisosi.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/joxafenon.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/908126de661cd3385b7e1fa8291048a5/8722284132.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e0b1db42c---moberuwabugowewanejinuti.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f4dd1b8b6---84037989248.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/97f0e7bfe09d9f919f5a0af92749f2a9/fizavewudepidilaporenesa.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/sogokasubokodagejobum.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/13388764972.pdfIn PDF document text
    • http://stattus.com/assets/file/diguboku.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/mijazoduzekofodobezojon.pdfIn PDF document text
    • http://gianphoiduyloimodel.com/Images_upload/files/nibolupudulazinilub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ode+on+the+death+of+a+favorite+cat+multiple+choice+answersPDF 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_off0002ea10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA10 18412 bytes
SHA-256: c41e90035f62a9f11fe32e6f9781a96c9dd40df7d6233165ad4d645eb00b37a5
font_01_sfnt_off000319b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319B3 11160 bytes
SHA-256: ac1ef7d5c2bba19f057d163694bcbde396474d74f37c0674d3f218e60c5c33de
font_02_sfnt_off000333af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x333AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1