Malicious PDF — malware analysis report

Static analysis result for SHA-256 2852ec2c4b6554c5…

MALICIOUS

PDF

83.4 KB Created: 2021-07-31 20:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9e0b92ab9da2425abb84551c31a2eacb SHA-1: 0d5c19b73c9b5d9c180a3239aeb8036651eacc72 SHA-256: 2852ec2c4b6554c520ca170b62b64f0ba8390e223f6124d47e8ebe8780c97140
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' suggests the document instructs users to copy and paste content into a shell, a common technique for executing malicious commands. Numerous external URLs were extracted, many pointing to compromised WordPress sites, suggesting a distribution mechanism for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://garglob.ru/uplcv?utm_term=kelor+kirti+full+movie+download+3gp PDF link annotation
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/uq6v85hekv8uc3496repost1d7/39980953223.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/kojusam.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/2dc9de47818960c0d39f9f662f8d3cef/43962163974.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/18mei1qtglf4uppedpskahf6j9/39833023769.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/miritile.pdfIn PDF document text
    • https://cs168.tw/upfiles/editor/files/rajonam.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071638dc6830---9288792862.pdfIn PDF document text
    • http://rc-modeller.se/images/file///wululimarimaleva.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/25beaee211621658138b48bd5faf4b68/53531215365.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/qokp2u1lp6kqp690c6elir24c4/75686130062.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160db00b4591a0---xijuwipefazu.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/roxamasamaxixedefuduvug.pdfIn PDF document text
    • http://horlickhigh61.com/clients/a/ab/ab3fb267cc30d45b98f460a20cee0b8d/File/35769317789.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210629212535.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/kazes.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160872e16d5d85---lenuvikojoxaxu.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/79081717938.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/6610049771.pdfIn PDF document text
    • http://kimkhimientrung.com/uploads/image/files/rusekugixokoruxofu.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160792238f3301---81125725729.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/zexataroferine.pdfIn PDF document text
    • https://adikketiga.com/contents//files/78577329482.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/c2dc618ca8a3c3aeab378dc1189000a5/pazapizu.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac193f5e2d4---vakorigul.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_off0000deb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB7 11180 bytes
SHA-256: 1cc018e18c85d57d22c5bbda8952e4abc88bbd76a015f2d844893a58047ff329
font_01_sfnt_off0000f8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B9 17768 bytes
SHA-256: 446ba7573ec2c6835e7206ddb26b65ed5c88fbb4106ae8c0bea722284af018aa
font_02_sfnt_off00012788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12788 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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