Malicious PDF — malware analysis report

Static analysis result for SHA-256 46624db281ba790d…

MALICIOUS

PDF

82.2 KB Created: 2021-09-05 04:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: d9b4d81f1af93ec06eb2a2476b6f1b0a SHA-1: 49068d5bdaaa2fa44669f640e3d2c27eda459a31 SHA-256: 46624db281ba790d2dd6fe4056077bb703b53f4b0f1e0b57f1eb603ad5035e45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160940fe1ba43d---virafelulumilo.pdf In PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/6379329ec56af1b51193ba9fce191dd3/sowagadidafozomafo.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/97518818189.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/gagonukavawem.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/25864856184.pdfIn PDF document text
    • http://avgdesign.com/userfiles/file/17975718960.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/nutaleloxerufazib.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/11439598698.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac06903397---welobavatimonud.pdfIn PDF document text
    • http://biotledlight.com/userfiles/file///guwewidavodalazemataxun.pdfIn PDF document text
    • https://roshnaai.com/ckfinder/userfiles/files/77057883807.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/io7i96l58lav27niojv6p4rulu/97446017644.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/inospvqm14gsh9o1er69qim2at/kijemepilefiz.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c56fb635105---betunejoxalilixidajapamaw.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gesurepudes.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/bffcc944c47183350c6b4db175089cc5/94611775534.pdfIn PDF document text
    • http://art-ball.net/files/file/vepodagowuw.pdfIn PDF document text
    • http://candientu24h.vn/webroot/img/files/befudasudopitedikupepaj.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/25997045708.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b3af4fe5f71---49632820808.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160869f43ba582---gagavudigerurur.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/83671037232.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd15a3a78b---71969667700.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/dcfc152a31e6f42011193abce2dfda85/66397212215.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080229a67340---jupunojupekixon.pdfIn PDF document text
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/18b905926be724c8f465ba8c5ef85a0f/domawabenewugakom.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/83436003276.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=maths+division+worksheets+for+grade+2PDF 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_off0000dd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4A 10944 bytes
SHA-256: cbb2c6e572eb4009b2be0b3b428e9878bf7bdafffca044abb19f67df105d4ba1
font_01_sfnt_off0000f68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68B 17244 bytes
SHA-256: d6e2d49c8f636e8a7273f39a9dc57db48281ec6d9f7bb8dfff6b40fdfbdf5dad
font_02_sfnt_off000122ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1