Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b8f6e158c6871ad…

MALICIOUS

PDF

82.5 KB Created: 2021-09-18 13:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5819658f6184c4f82c0187069443e93b SHA-1: 7bbd4efca1b4ad468c176c043f6c60b22d25442a SHA-256: 0b8f6e158c6871ad0597d68f7a90685f07cb1a4b8117c32308a9e9970feae0a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://coretry.ru/uplcv?utm_term=pdopa+apps+download+for+iphone PDF link annotation
    • http://daedukgs.com/admin/fckeditor/data/file/20210907215137.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/jipelo.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132082015b3d---netafujekeg.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/gewupipigevofubikexixoka.pdfIn PDF document text
    • http://droneducational.com/admin/userfiles/file/55801139869.pdfIn PDF document text
    • http://ecole.ru/text/images/file/xemimeruxefidupel.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/39184724004.pdfIn PDF document text
    • https://svezadjecu.me/userfiles/file/91524660007.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog/file/12365466253.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/novaf.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8aee85146---59709714501.pdfIn PDF document text
    • http://a-pluset.com/userfiles/gopuxozunakotifexadek.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/tonowutalilaporegode.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/rofenagetitawutofodi.pdfIn PDF document text
    • https://chambres-a-la-ferme-plouzelambre.fr/userfiles/file/muzejilejinusagebarebow.pdfIn PDF document text
    • http://tonyprins.nl/images/uploads/file/xideponatilu.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/56548505310.pdfIn PDF document text
    • http://leeharringtonhomes.com/userfiles/file/15300301620.pdfIn PDF document text
    • https://bazk.info/public_htmluploads/file/zuzodorologivapogij.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/33554122204.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/zoguwodafuxunerogizul.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/161308cf47308b---nozijebupekijaf.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/64766159683.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD01 10584 bytes
SHA-256: a87a3f896cbe27c7abaa642c29b4b4688e1f16581f513e1992a77d18e5755a03
font_01_sfnt_off0000f520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF520 18276 bytes
SHA-256: 260bcefe6f1f81c29a665e42a128c682450ec335de0150f21b2189dd23c1e237
font_02_sfnt_off0001248c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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