Malicious PDF — malware analysis report

Static analysis result for SHA-256 898cba673938adc0…

MALICIOUS

PDF

80.8 KB Created: 2021-09-10 15:33:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 439894ff99c398ee340bc6cddc4cd9f5 SHA-1: e8327db2aa7e351700744552d5ccd7caca85dee4 SHA-256: 898cba673938adc086c694fbefa88dd0369a532f739f38b1e0c2b72c0a9837f1
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and multiple external links, some pointing to compromised CMS uploads and link farms, suggests the document is designed to redirect users to malicious sites or download further payloads. The 'SE_DOWNLOAD_BUTTON' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://restaurant-kamkok.fr/img/Data/file/49802182577.pdf In PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/3d16fc9e901f12ace0f5d1c8e9ee5009/54501260284.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/zikonuk.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/34428688426.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/dfb4844b9e39f751660a3616561ff9c5/64751151074.pdfIn PDF document text
    • http://ride-on-earth.com/images/blog/file/37965324106.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/mekatutomij.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/63040638039.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/tikujibimugom.pdfIn PDF document text
    • http://borneneskontor-landsforening.dk/userfiles/file/pafulotige.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16135702117575---tevirizu.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/43627709322.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/09/files/210902192143.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/xoxinosudef.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/dikulunotese.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16138a53a87d98---ranokisiwavutomuzomuxop.pdfIn PDF document text
    • https://yoimart.com/upload/file/20210901162249.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/63583195607.pdfIn PDF document text
    • http://zkqzl.com/uploadfile/file///2021090522280571.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios/files/nisepanufagifunepixef.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/bilubemebax.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/65637288703.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/27198053078.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=taylor+swift+songs+download+mp4PDF link annotation
    • 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_off0000d4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E2 10948 bytes
SHA-256: c44b52e59c12dcfb065f3890d03db5beba4be3bf68d7a9b31ef13b332bc8f0a0
font_01_sfnt_off0000ee29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001063b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063B 17892 bytes
SHA-256: c7a43c5233d4656bf3ea8211b3c67ad1b2eb2b7c7b9dca63817117d93f0f9760

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