Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba156b20065a3fc…

MALICIOUS

PDF

80.1 KB Created: 2021-09-05 09:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: ca37e50ed4aa5dac9e2e2f6fb4c452e5 SHA-1: 522b948915c884ecd765108f98f8c9d0452d6efb SHA-256: 2ba156b20065a3fc16b28d44c740a783f0ac633b8957a75c0fbe6cb95e25c5fd
164 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://synerhu.ru/uplcv?utm_term=spoken+english+in+telugu+pdf+download PDF link annotation
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160f2cbf10422e---88748022701.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/55225493405.pdfIn PDF document text
    • http://www.emailposte.com/pictures/sowamegejorarakunil.pdfIn PDF document text
    • http://aeon-dev.com/uploads/files/202108281859137059.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/kokokalutanivosawilukiku.pdfIn PDF document text
    • http://voijin.com/userfiles/files/manuwe.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868781ebb95---97408771061.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4ab64efb8---xadirivu.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/fd9ac0dd79a47adba52212c5b3b1ed62/50968024879.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/50028788485.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/67407811252.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/61605287568.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/2nvr83gdie2en86aqdgrvv9oqj/luvatoz.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/18033863168.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/desulurulov.pdfIn PDF document text
    • http://www.irrv.org/uploads/files/bejorosil.pdfIn PDF document text
    • http://elitvorota.ru/f/file/dipiwatatovudo.pdfIn PDF document text
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/kedusolosubazugaf.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607034ee6a855---rekake.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/16085739592.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b4106d3fb35---mijogejagorelese.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f34320bbb0a---mezedelabi.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/bavekomonofunad.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/9ed73fadbae2be6be205018725e9e998/vadosorive.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA60 11028 bytes
SHA-256: fbba364a2fd7eed54aa7f74b6175907af013a234ff91f38bda0a79ac27b90ced
font_01_sfnt_off0000e3da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEC 20888 bytes
SHA-256: 8b36ee289bf82a11341c67ec8049a2c2206a756d6103cc7aab2f2aec3de41f26

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