Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1b693f2fef3b47…

MALICIOUS

PDF

82.0 KB Created: 2021-09-07 14:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5a38667397f9da0aa2de8eacfc29938e SHA-1: 7e39eaef211dd46db92bb1ab268d040e7fca99f2 SHA-256: 1d1b693f2fef3b472b69455a6ae127ca9b3bf2f6439276cd87bb96437bb4b8ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or engage in phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://bukhatirhomes.com/userfiles/file/41505664450.pdf In PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/4clullh85s2en6p0okga6bb28b/3296160808.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/71ug66i05o1fulgllmc3q01fb7/78916181865.pdfIn PDF document text
    • http://k2plusinterior.com/userfiles/39504928681.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/wemimuwuwimoko.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/4a5a89c21e0bd4936f702c2c4454ff4c/guzujemegiwakunatod.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/kanufokaviw.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/4e1b929550154cd7ae3738ca36390658/bovitu.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/29700991142.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/e346670d018f893a8a0e428cdea2900e/resunagimikano.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/mobifepaxemibizit.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609077e5c45c2---lajebiwu.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/250be38fa52abdff890c7c5666491d14/32446002135.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b47dc9135---mixabuxuwigajujonifotox.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/39191171868.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/nifuduzug.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/63512424042.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/fa039799d801c1150493c2b151cb1b42/72611319003.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/pirawavezonafovu.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/rozug.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114aa795bc49---43576569940.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/c8ee77ce80cba818e5f0d305bbf35a2a/mukolewikepudalemun.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/ad3a4565beb1dbda3c0127a20627c8ac/forixokopabupa.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/galigamatugolediniw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=jntu+compiler+design+notes+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_off0000da69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA69 17956 bytes
SHA-256: be5badaf3ccad39fed9808b736585ace0c998865ef584abb30ff8104f52d5daa
font_01_sfnt_off00010943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10943 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001215a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215A 10892 bytes
SHA-256: 92a2e59f34c6dbd1341419eb54b62eee29800440d080fbd94be5fe0221707cc2

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