Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ccb59c2b1d5bf98…

MALICIOUS

PDF

115.5 KB Created: 2021-08-28 23:36:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 136931c8669b6c5e50dda7e1235830d3 SHA-1: 4cd6333bd98ad548cae077fc4547da4b30dfa056 SHA-256: 7ccb59c2b1d5bf98bc7af2bd34ac8e06187f21e7f30faf7ef8c1c61845693c27
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links to external sites, many of which appear to be hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The critical heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs the user to copy and paste content into a command-line interface, a common technique to trick users into executing malicious commands or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://archism.ru/uplcv?utm_term=why+do+atoms+stick+together PDF link annotation
    • http://avvolodin.ru/upload/file/46344511409.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/gugutesekesizelet.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/87055608025.pdfIn PDF document text
    • https://cyklo-wellness-penzion-palice.cz/content/rawixuxe.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/fec3abedf5b3467c49e96169685661ef/dolefutapokab.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/269861818.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16082065d2efff---zalofuwurikumusenu.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/dle17gmikbqueelm6o0p5qnlq4/94242769108.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/zexatojafepuzulafuzo.pdfIn PDF document text
    • http://hzdshg.com/images/upload/File/moxijusugoladal.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/gutapisunomolon.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/wewavipiduxuxuzoxixux.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/gagigitifawiwuselax.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca3df08cab---80638565354.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/15980618610.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/529583d02e28046e381a854442bff59d/buged.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/24037155530.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3a38e7eac---netaxavobagipebixosefiwo.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/74582040732.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/85427116919.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/bapemuviva.pdfIn PDF document text
    • http://soles2walk.cz/data/file/jorifageritikosupebebo.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32c4dd9ac5---11448173457.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/1kv77rf58c8mvnu49gt80nkp96/1247799889.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_off000161a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161A6 10864 bytes
SHA-256: 8d817c49da2f0806d47d9ddb3d5f8628a8b60c12bd24078f7d680a8519fad219
font_01_sfnt_off00017a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A9B 17708 bytes
SHA-256: eab42acc3f69bf3d6160319b9db09780933353ae184deda0fd8e733fa94ee8de
font_02_sfnt_off0001a866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A866 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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