Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a720a404564a7f…

MALICIOUS

PDF

79.7 KB Created: 2021-08-26 14:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5beac1e54316e05949d74c0f8fe76c90 SHA-1: 6acbfef782be07bb6787bc7c94daad2aeb286344 SHA-256: 49a720a404564a7f16870c789fb6009fb9fe517fd39450bd14da4a9c5a070667
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the structure suggests it's designed to lure users into clicking links that lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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://queure.ru/uplcv?utm_term=5.30+pm+gmt+to+ist
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/56327e3bd318ba0066cf50e7ee5d9138/78783791976.pdf
    • http://biomassasia.net/data_ed/userfiles/file/wumupetegabexofipum.pdf
    • https://autosaloncenter.com/uploads/file/jujolufolefukamu.pdf
    • http://prime42.ru/userfiles/files/38388925663.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/554f443f93f78c8e62184848008c3fa1/miwemokasobowusaj.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/34b424d29f5befa6fce20e1f011e8b64/tezoxivib.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c94071cc3---83875310186.pdf
    • http://ekorob.pl/userfiles/file/4685117627.pdf
    • http://transcash.com/ci/userfiles/files/55228364747.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/gm0rpe59s8n1i4p60veld3rc2i/11510926554.pdf
    • http://drive4smilesontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/8661156660.pdf
    • http://tipsclubcr.com/campannas/file/safibifaranudomutesavoru.pdf
    • https://ecoolteh.eu/galeria/file/84810347998.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/70100185395.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1f475cf50---13904890570.pdf
    • http://giasuthienphuc.com/Images_upload/files/91211873023.pdf
    • https://keralahappyjourney.com/ckfinder/userfiles/files/87184322433.pdf
    • http://www.sec-ollivier-associes.fr/www/upload/file/duzaxolatute.pdf
    • http://hak-al.com/resimler/files/83694879524.pdf
    • http://abpjse.news-read.com/upload/files/zizowofalasenom.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c91f4d97d---wekenipopumepuze.pdf
    • http://laduses.nl/image/file/sorawezameda.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/9944697e3492a20b0564ad9e382a08c2/rumabitew.pdf
    • https://powermailer.in/userfiles/file/61781049824.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_off0000d3e1.bin
6dfd1e1f48478a19d189df76f396f23e27301a3632520181a244b516e5996d68
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E1 10448 bytes
font_01_sfnt_off0000eb8a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8A 16792 bytes
font_02_sfnt_off0001039c.bin
d2a84529bf2a06dda6f416e168d652d24aab1fce32c5557b852b9616badef193
pdf-font-stream PDF embedded font (sfnt) at offset 0x1039C 17536 bytes