Malicious PDF — malware analysis report

Static analysis result for SHA-256 d61d7317284e24c4…

MALICIOUS

PDF

85.2 KB Created: 2021-09-04 06:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c67d2d0031277a4b821ba85b27a093a3 SHA-1: 3421b7ff33e3d14db468a1c7a1ce8e6e70ab090b SHA-256: d61d7317284e24c4b33930ebc3f938d122d36a36762cf4668051a9b53bb66bcb
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous websites, many of which are hosted on compromised WordPress installations, suggesting an attempt to direct users to malicious content. The embedded URLs and the nature of the link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853bc3b65c1---fixerivuputefesunefuta.pdf In PDF document text
    • http://centrumbiznesurawicz.pl/userfiles/file/30091540275.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e562d43f12---62366465025.pdfIn PDF document text
    • https://cherrychile.cl/cherry/uploads/contenido/files/fapatenexokoxa.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/70ce3e146a1212ab7ca4f99e60d301de/vuzikurorini.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/2956097313.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/tenizevukux.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d2fddc8b4---15937169831.pdfIn PDF document text
    • https://laflammerouge.ch/userfiles/files/xujirose.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fd3fd54279e---96343947298.pdfIn PDF document text
    • http://debden.org/userfiles/file/waputetel.pdfIn PDF document text
    • https://yodobashi-church.com/43207177301.pdfIn PDF document text
    • https://classoft.ro/userfiles/file/33759279158.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/bewupomol.pdfIn PDF document text
    • http://placc.info/up_image/39524665745.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/f1bf3f6cc4ec7a6854e9f1bc9751026c/83377398250.pdfIn PDF document text
    • https://guijek.com/userfiles/file/59562952361.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/24048191784.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/161299e16be5f8---66381636104.pdfIn PDF document text
    • http://elm3rad.com/file/tijuvikimap.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e326ba3b8---muzawi.pdfIn PDF document text
    • http://ckudzcssffhhj.handysociality.com/upload/files/tiladeke.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ccad2bd6b---79849426118.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b8f4415d1---23449245386.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=meio+ambiente+conceitos+e+defini%C3%A7%C3%B5es+pdfPDF 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_off0000e0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EB 20232 bytes
SHA-256: bea50f89bb356163af899b0b1f7443b68acfa67bce2b927cdfc9b455bc0a8e73
font_01_sfnt_off00011378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11378 11192 bytes
SHA-256: 893787271b4486265554dc0e0dc17f4a10c5fa4fef2c58389882f05754b54bcd
font_02_sfnt_off00012ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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