Malicious PDF — malware analysis report

Static analysis result for SHA-256 6504da23717b71e8…

MALICIOUS

PDF

212.4 KB Created: 2021-08-01 01:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c1fd522da32ed85d43a8e0bcd81a007e SHA-1: 3e0e99dd0da082ad83c94c430036d774a870cadd SHA-256: 6504da23717b71e81e477e5056d639c7f0833d2792b16f499ba3334b624cac49
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits characteristics of a phishing lure, utilizing a redirector to a compromised WordPress site. The presence of a 'password-protected archive handoff' heuristic suggests the document's intent is to trick the user into downloading an encrypted payload, which is then intended to be opened with a password provided by the document. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7619

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://crysiq.ru/uplcv?utm_term=los+r%C3%ADos+de+color+p%C3%BArpura+2+pelicula+completa+en+espa%C3%B1ol+latino PDF link annotation
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/97iop1ncotm0lo6a1mv4ojgui6/peretitemituremufule.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/figaleb.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/27552374209.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609499c4829c3---fapaxiza.pdfIn PDF document text
    • https://aathichudi.org/userfiles/file/bidamevi.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/fmbq9tuum4tccuuhq5qngf80h9/gekimudevavelobefas.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa54ccd667b---56991007741.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd4612ca42---30465679091.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/wagaguzoruvotonizujozuwo.pdfIn PDF document text
    • https://tahubunting1.com/contents//files/vixofexalelobekum.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/36671478783.pdfIn PDF document text
    • http://portalkucharski.pl/app/webroot/media/files/45587499314.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/u5ulncn9oskm55r5r6bmj5rjn5/37477002403.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/77956249653.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/kiwisifokevum.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/gokurenexuxebebo.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/0267cfc5598de84ec90706a7aa0928f0/gonerakavawomozarafunito.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/40ffe7aedf89db1b8d33849693494c5c/gelilaboretusotosufawe.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/mb4ome4attcqh2d8poer5aau2r/dajikote.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/xogajati.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160e6bd6ed08f1---xudawemixuxipazagifowude.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/9c7b6b2094d4e08865edc0e9a127fe39/nusawiritiwugalab.pdfIn PDF document text
    • http://matras-devison.com/upload/file/gadukadidaxozoporisizer.pdfIn PDF document text
    • http://euro-ex.com/images/blog//file/57766676044.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/cd78f06529b38bd53e136c98f31fe011/togagobogibipa.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/86dc74602d28efbc254dc6d5fb784635/tafituxas.pdfIn PDF document text
    • 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_off0002d29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D29D 23328 bytes
SHA-256: 1ca20245aaa8e223b66ee4cf19a3301c3b22decfb7cdbd66277ece139e8d75ba
font_01_sfnt_off00030c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C95 11236 bytes
SHA-256: d5a31e15cceca86f270c45c635f5f4bdf0876cbfce1aad040925da3377cb9a64
font_02_sfnt_off00032668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32668 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1