Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee9b28abdb406c3…

MALICIOUS

PDF

72.7 KB Created: 2021-06-28 06:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 27adbf3d6da2b4e766475f339add19f9 SHA-1: f5452c380727f5e45057ed5c4e894f0d09340f5c SHA-256: 7ee9b28abdb406c31e8ec07a38124bfe5148ec0fa816edf2749c1d17e62e8220
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/vae6d13j44meja71mt0tel2qp9/97451539460.pdf
    • https://shipnhanh247.vn/asset/files/91706957165.pdf
    • http://hkt-optics.com/hkt/images/userfiles/file/ludewew.pdf
    • http://satakantaresort.com/user_img/files/25651939811.pdf
    • https://digireg.it/upload/40419700574.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087f642c7fe0---26012907571.pdf
    • https://amitadevnani.com/userfiles/file/nupugamabubuxipim.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f089166059---kivewubagikipa.pdf
    • http://av-jet.ru/userfiles/file/92731796812.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084305bccbc2---tiraxepive.pdf
    • https://avenue102.com/uploads/file/dubakaf.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b325af30fa5---venim.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/73d5055729a84b1c292159d07d0208f3/poxidiveg.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a72e1ab695d---rasetasuradujuxipifi.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a21c0f52d89---72048893686.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a400f263ce6---27960799920.pdf
    • https://nepalimodelagency.com/userfiles/file/53928967424.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609df2d863b88---45498002311.pdf
    • https://trvstore.com/userfiles/file/45375224924.pdf
    • https://299-45.com/CKEdit/upload/files/dedebuniriv.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/1bd61e69742608f74a7e96a74642136f/xowekesizapadurolewimixo.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160776b4bebff4---jiriwoteba.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/fe6d5f86ddfb751bb44d3d74bffec0aa/majapoxamixifumibubolom.pdf
    • http://amirafouad.com/uploaded_files/file/9004724728.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608758262110a---wujulemapekuvakuvuga.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=general+science+pdf+for+kpsc
    • 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_off0000b902.bin
13db6964192f91395204ef318f83444541456c264514cc10a2b8272051d036ca
pdf-font-stream PDF embedded font (sfnt) at offset 0xB902 10648 bytes
font_01_sfnt_off0000d17b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD17B 16792 bytes
font_02_sfnt_off0000e98d.bin
e7a2c793dfe4fe17ca73081ee21df595e489df11ab226da89be841da359561b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE98D 16364 bytes