Malicious PDF — malware analysis report

Static analysis result for SHA-256 91292ef6aee06df3…

MALICIOUS

PDF

78.2 KB Created: 2021-09-06 20:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f4ea8309d94bbfe9b9034192b6c3495a SHA-1: 764090811bad28272ff3d17b9a0792f0bc999887 SHA-256: 91292ef6aee06df3b0702ae38b700cb00c00d10083c519ad6e9896b41a213c3c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://synerhu.ru/uplcv?utm_term=flight+of+the+bumblebee+partition+piano+pdf PDF link annotation
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fa31f8eadc8---3920865969.pdfIn PDF document text
    • http://henskeschildersbedrijf.nl/upload/39125264110.pdfIn PDF document text
    • https://whatproperty.ng/ckfinder/userfiles/files/jitopudevud.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/198213b5867fdc69bf9a8f5933f4d1f7/saboxikagavogepamipaz.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cb7a256dc---66024183340.pdfIn PDF document text
    • https://stancijanegrin.com/UserFiles/files/87863503146.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c89d8eb18ae---30282790746.pdfIn PDF document text
    • http://isvpro.com/custom/files/sawebok.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad4543a738---37934545213.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/69499158160.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/fjdkgvci7bu9u4t1gjle1m1ttr/gokapifilozazataxupe.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210627/file/16248299077212.pdfIn PDF document text
    • http://allycatering.com/userfiles/fogapotel.pdfIn PDF document text
    • http://ashioke.com/images/library/File/77816143993.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/e8c04f24cc0dba735ead0fa81704e4a2/74766408415.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/pubazekezuburobibazilig.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/87222820388.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tedafifokuzana.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607244c1ecd22---68999802765.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/nololevurasujabokimunoj.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/luwiruzubazovop.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/7474d88ffd168a9a7141f5728ba9dc8d/labawoxurilovevolajopumoj.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/pigunedabatugawodepora.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC997 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A9 18848 bytes
SHA-256: 507bb559d9a3c60a040bcf94e9e6cca3eb149b862674a4d03830efcb5a0bc4a5
font_02_sfnt_off000113a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A4 10992 bytes
SHA-256: 4cb6b84172d1aee366d1e6ab2c33e54ce747eadffc7207e5773d7c1c8fafd4e8

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