Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf6be711a46a42a…

MALICIOUS

PDF

149.5 KB Created: 2021-07-13 21:09:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 475d3bba654d01ef79c839326d04b4be SHA-1: de2665748851288efe6a7bbe5520abe81b9b2295 SHA-256: bcf6be711a46a42a1ca6633c6f6ca911ac33b6eeb5ec37ade4d5f00166694460
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content. ClamAV detection and ML classification confirm the malicious nature of the PDF, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6429

Heuristics 5

  • 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
  • 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://wastran.ru/uplcv?utm_term=matter+and+its+changes+worksheet PDF link annotation
    • http://texmet.pl/userimages/file/sekadexufatadagexebesab.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/ba44a2792ffe8b594522cd6920ae63b2/55449801698.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b9a5e17e90e---25857419273.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/pirifinuredavosawupeku.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0421c42090---57562633620.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c6b44309eb6031dafe17d5b00dff8e6c/55818286866.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/tibedapinav.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/1b7697d366e6eb9b839bfa89744c505b/kimebobafozusiganag.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072d8b7cd3cc---befavojamezowafexipo.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4116247443.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/1d9f1dbfe763c101528bcf29039ca26d/tanudamivew.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824b84a26ce---sidijonegej.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/zarexalobatapi.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/396f59efd44406939de57a9625922f7b/suwolajafam.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/dk2od8mfckhp6gie0kh32n3mu8/fiwonemejasosati.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5c4e73860---garezuxobigajor.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/bupitigemumixuz.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/25545546564.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aafec6867ad---62273451446.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/80g9omns1pcl32mgjpltbro2ce/20413547098.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210604155831_127446741.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/54176551736.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e055928d4b---92036215499.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/vatajuledejupapawase.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000230e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x230E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1