Malicious PDF — malware analysis report

Static analysis result for SHA-256 30240868110bec41…

MALICIOUS

PDF

81.7 KB Created: 2021-09-11 21:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9e8f72bc65b9e226f723cbc34132581e SHA-1: 1ed8aefefe8cdf06780466bb683a5b6d6535b329 SHA-256: 30240868110bec414771abeedf47ec843662ba292d09901490796000e7765c3c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a spearphishing attachment designed to redirect users to malicious sites.

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://medvor.ru/uplcv?utm_term=my+classmate+from+far+far+away+watch+online PDF link annotation
    • http://lakesnwoodskerala.com/uploads/file/bokipe.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/sotuziki.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/161339202a8bb1---furowadugusebe.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/26684046565.pdfIn PDF document text
    • http://www.vako.vn/app/webroot/uploads/files/detese.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/jerakulifajemaruriwosu.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/wavosexerif.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/zoxelonuvekuvelas.pdfIn PDF document text
    • http://reopen911.info/media/file/12796877053.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/q04ofng2hvgs0nt8grdoh62lr6/sipezipaxiliroja.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/vosivobaxez.pdfIn PDF document text
    • http://oodow.cn/upload/file/210905212632432559gmu81cweazr5.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/23813282475.pdfIn PDF document text
    • http://bushurov.ru/images/files/87307162694.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342a047bef4---91274738942.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/bupufifuvekig.pdfIn PDF document text
    • http://raczcsalad.hu/files/munore.pdfIn PDF document text
    • http://eaupureinternational.com/userfiles/file/29931698496.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137a5aa3c38d---56856954504.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/tinebabolipizesokid.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/d59bc308526fd83ca3d247d4531a2fd9/pigopeloruzasubem.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/34061511326.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/55392357768.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_off0000d988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD988 17844 bytes
SHA-256: d850dbee3dd7dd9ff85ed27a604cd2f16f7f120f5ea96a2a1c78dd01956c2445
font_01_sfnt_off000107b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC7 10796 bytes
SHA-256: 8d9d7f0eea5ad31c7bf1520622cdc8d007a9a81952a4acf50b8d0e07b0a6c5e1

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