Malicious PDF — malware analysis report

Static analysis result for SHA-256 b568695342fef98c…

MALICIOUS

PDF

70.6 KB Created: 2021-09-04 06:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 420562dda078fa466140b73c350fa3f3 SHA-1: f2581678695669e0e7b9f189135285b4b7873da4 SHA-256: b568695342fef98c3178cde1cff4db56fbdd622c5fec834dac78238789729bf5
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised CMS upload directories. These links likely serve as lures for phishing attacks or to distribute further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7495

Heuristics 5

  • 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
  • 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=hasil+bahtsul+masail+pdf PDF link annotation
    • http://aaaexpressac.com/userfiles/file/64073465103.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e53776945---gerisuronizamopekagemobe.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ba04bc767---nimukexadodalaripebi.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/bc84aa772eb2d8f54bf8dca987782d06/durusokezujiw.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/3780ed26e43e8cd67601c33b5c5ac2c6/68373889441.pdfIn PDF document text
    • http://hicoweld.com/shop/fck_file/file/75374267883.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/sq2rso33dah08f5fado16ukhnl/gisazejarafol.pdfIn PDF document text
    • https://airbays.com/userfiles/file/babodowedewati.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e7fcf8c7b56---dajuvekegiluzekawupepamaz.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/31640200578.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210829032152.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a49c8856aa---23460475950.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/56371101802.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/71475599161.pdfIn PDF document text
    • http://atek-ent.com/upload/file/putalinigokiba.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/bafokixuwuboro.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/bodenese.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076dff40cdc9---fatipesarer.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608139366fbf3---74928223075.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf92ba193a9---72437886271.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/8cfee88519a2c3cceeb468b37b18bd18/63784894723.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC12D 18424 bytes
SHA-256: 06c8e281b4906f62fe4bd91512be354640696a4d7e170a1bf6304c09ead9390c
font_01_sfnt_off0000f16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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