Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1661b2cc23384d…

MALICIOUS

PDF

340.6 KB Created: 2022-01-14 19:16:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-30
MD5: 31d67f6cd4e711bf305edacac39e4e0b SHA-1: 27ab0f7f5b0db491c92fd01efceca124d6a940dd SHA-256: 5a1661b2cc23384dde5173ad821c1e706d08e858acfa4723a3b1a463997f1e73
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7623

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 https://queure.ru/uplcv?utm_term=adam+smith+theory+of+economic+growth+pdf PDF link annotation
    • http://stapi.org/assets/kcfinder/upload/files/78596027878.pdfIn PDF document text
    • https://telorgabus.com/contents/files/37181589749.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/161b9106f88113---ruzuvemu.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/137648520.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/podiwim.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/26975543279.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/b20c64df6290ea650e22045f208b2a95/78417559761.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1618fc3a097012---56184624554.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/kezirugogirewaninuburaz.pdfIn PDF document text
    • http://wizclub.net/upload/userfiles/file/53143695219.pdfIn PDF document text
    • https://idroilektriki.gr/files/file/37415227954.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/jufoza.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/wexobero.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616fce2f5c9e2---junewipubatiwena.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/wunaditoruzuzobanafa.pdfIn PDF document text
    • http://tlumacz-francuskiego.pl/userfiles/file/97153134283.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16152ca7fa54dc---nifuderu.pdfIn PDF document text
    • http://advocaatindex.nl/images/uploads/vilovivetitevedasu.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/fuzuxol.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/81972151408.pdfIn PDF document text
    • http://bburago.info/admin/fckeditor/userfiles/file/60215704158.pdfIn PDF document text
    • http://bridgeonlaw.com/filespath/files/20211014071250.pdfIn PDF document text
    • http://achwvs.love-mrt.com/upload/files/vosateripawugigonodin.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16144ed121d25e---lasijasepaxazasigupuxal.pdfIn PDF document text
    • https://spvi.cn/filespath/files/20211011040628.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_off0004e41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E41D 11204 bytes
SHA-256: 6463092fb9ede9ca31bc8146203c70a1444801bcd503c492596156a2004e625d
font_01_sfnt_off0004fe14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE14 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off000514b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x514B3 17992 bytes
SHA-256: 1c60befb5b71bb16a671e072cc7f1c7eaff2d04aa5b8d8bfccc345f2ed126301