Malicious PDF — malware analysis report

Static analysis result for SHA-256 286915dc0bea931d…

MALICIOUS

PDF

86.6 KB Created: 2021-08-21 17:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 980af9437ac7a00a44fdb7fd2df6bc87 SHA-1: 5a737c51829f1db2ba6dcdd2fb79662776201e67 SHA-256: 286915dc0bea931d34779ef3d0f6525a8a39ac35a7e6d2f1b9a68edfd6f5c7b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The presence of a URL with a 'utm_term' parameter suggests a phishing or SEO-based lure to entice users to click on potentially harmful links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://drafthe.ru/uplcv?utm_term=wanted+hollywood+full+movie+download+in+hindi+dubbed PDF link annotation
    • http://netisiletisim.com/guvennet/resimlerfiles/75208580686.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///pavusabe.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160afbe7a6ec33---wosojotudunefidatafoxu.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611135e338d43---32353100762.pdfIn PDF document text
    • https://miruyuta96.ru/admin/ckfinder/userfiles/files/99456249000.pdfIn PDF document text
    • https://knurussian.kr/DATA/upload/files/202108170022484205.pdfIn PDF document text
    • http://erdbau-rauch.at/73836655926.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/ea235082122a3a6b0ac65bb07cf65bb6/lezusigix.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/o2gaq6bh379pm2v2etvllonvm4/74770082172.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/molesoxoxupajefa.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/14101945464.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/welab.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/l46idsb62ir3mhn5g5jvjmo2ge/voliwavalisivejukuzujog.pdfIn PDF document text
    • http://umhouses.com/uploads/files/70078861287.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075ac8fad678---wepizeboxibego.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/67820a2df21fa31461c743442d42bde4/dufivuzadu.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/puzemonatibukovawoker.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/vatuke.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f7860f3bb2b---bevajiluvuvabuzad.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/kh3v60nq5mmhigvo7c4cpmolab/70071797958.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/c92557ddc2a9ae2acc06f5ea19b64b3d/nisojelalerimola.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/minanizobikotexenag.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/jogopilejeg.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/8561b94d844e77c45056d46618520286/pimop.pdfIn PDF document text
    • https://badeluxe.com/userfiles/files/78612165859.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_off0000eae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE8 10848 bytes
SHA-256: ed759df7f88eba25d18296176d2f4e613aa8138cab2b266820180773d70979d7
font_01_sfnt_off000103c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C7 18408 bytes
SHA-256: 60df5e90d518f02064990f4371030969147b7606abb4e5c1c53ec128e08194a9
font_02_sfnt_off00013387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13387 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1