Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b23b8038b7bd89f…

MALICIOUS

PDF

73.3 KB Created: 2021-09-15 15:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 00dad48e31c21f9eceaa14ebe551f908 SHA-1: 23e816a053abe5600c8615dd507a5ac75f9bcb25 SHA-256: 1b23b8038b7bd89fd8e60fa09fb93919f6dfec2120ca447ad3bf3e03b660dd82
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. Heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest malicious intent, likely for phishing or distributing further malware. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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://pixomot.ru/uplcv?utm_term=mod+apk+dragon+ball
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/95679245118.pdf
    • http://2sisaccount.com/userfiles/files/93184415707.pdf
    • https://istanajpdua.com/contents/files/fetewujali.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/n6v103of7qg9idd5v861sj7n5b/35875762639.pdf
    • http://2rent.gr/userfiles/file/77876688234.pdf
    • http://vietnam-intraco.com/webroot/img/files/nadapidimexazibatizu.pdf
    • http://tmkb.org.tr/ckfinder/userfiles/files/ruwuzeb.pdf
    • http://dekoblickfang.de/userfiles/file/84962034687.pdf
    • http://studioiulianella.it/userfiles/files/femafuximusebixowogu.pdf
    • http://rs-entp.com/upload/file/dapovewowidiv.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/161363495262ec---fukekib.pdf
    • https://sunriseinnjasper.com/nbloom/fckuploads/file/mugarixugilebavuvawukax.pdf
    • http://ktcz.eu/files/files/vazojitimoruf.pdf
    • http://hyundai-baoloc.com/luutru/files/digozewefabimawux.pdf
    • http://studiomanzella.com/userfiles/files/vamelemuxemuniro.pdf
    • https://democv.associasuite.com/imagenes/contenidos/files/26256308480.pdf
    • http://93564497.com/userfiles/90644069234.pdf
    • https://lasanisports.com/files/lavigalak.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/c570a3542c257c4a0765d3ccdcf45491/nizuxutiguwul.pdf
    • https://kiptep.ru/file/97267911569.pdf
    • http://www.mezmat.ru/ckfinder/userfiles/files/tulemimanizigezigir.pdf
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/39470315230.pdf
    • https://lentes123.com/aym_image/files/25318332825.pdf
    • 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_off0000bde6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE6 16792 bytes
font_01_sfnt_off0000d5fd.bin
4cb2371c5760e19d9cfd694f291c811dd850b84d28896b2aca5b064831026c83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FD 10300 bytes
font_02_sfnt_off0000ecc5.bin
06803738ab884b7ba6f2e09bc1ba268ba35d6b56cf68a144eca0290ac4e327ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC5 16872 bytes

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