Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b9d294b073a383…

MALICIOUS

PDF

78.8 KB Created: 2021-06-28 22:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1085415f0777ca030ba8d7f1eee6f0c2 SHA-1: 5f66cacb7e8901eb1b17c466bcc85e83cd161814 SHA-256: e2b9d294b073a383e306db4156cfb2fda8c740d53b49983a6a2c6c8b98e6911c
96 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is intended to lead users to harmful sites. No scripts were extracted, and the document body was unreadable, so the primary attack vector appears to be the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • 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://crysiq.ru/uplcv?utm_term=harry+potter+6+duration PDF link annotation
    • https://chameleoncoupons.com/adgprocessing/uploads/files/mizubijibe.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160744f3517355---70605209272.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bbca6da8af8---31106746705.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d83613534a5---14710969355.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/7f6581bd3f11c373986f31a2221d3e7b/32058651264.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/luwatinonufukew.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/bufezup.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/gixowoguv.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/270ec7ca41382beb37ccd6fc27c982b4/xataviwune.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/49db41932bed8557c6b0c9c5fc9a7711/pajivaf.pdfIn PDF document text
    • https://airbays.com/userfiles/file/winipuliramefinoremeniwi.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba08f6d338b---96148803845.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/mcfdsrq6vjf86v799hrh68sgp4/29872657446.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/5jk1ksaea24spv35a4813l4jcs/salumebezog.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/284b17cc69b044e944585780cf037c0f/biparojojadinuzaxaziz.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/tm124ho4puuds2gapad5vo4m81/99811957351.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160772a32cf51d---39861043092.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/vonedan.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/ahrj3pj6rj10amoskv9p4bom33/gagiriwidizawunodozulez.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1cfdf4170---jajusemovus.pdfIn PDF document text
    • http://starsunited.at/upload/files/83053123085.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/28123141845.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_off0000d27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA91 10544 bytes
SHA-256: 6c1915f2af8c09d0ea270bac719df9f9435f8bccc8f29d8d4b350889d3ba0163
font_02_sfnt_off000102af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AF 16872 bytes
SHA-256: 9d79f654ece8a30b77777b1235d72a91a9ce22d8b4222f7e410949716664941d

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