Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee0046431f68b0b…

MALICIOUS

PDF

60.1 KB Created: 2021-10-01 09:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 4d82491844c7050cc42cca51e8f2ed4f SHA-1: afeb6340824b290a21c0dfc058ce9d3a31925695 SHA-256: 8ee0046431f68b0bd06ab76a8633ae1dfc2fc72ab9b53eaa0aa3ca9d3b5bb384
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites and disposable hosting. The embedded URLs and the overall structure suggest an attempt to lure users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4569

Heuristics 5

  • 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.
  • 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://crewmak.ru/uplcv?utm_term=ma+chele+chudachudi+bangla+choti+golpo PDF link annotation
    • https://umutfm.com/resimler/files/60205761889.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/waxunig.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/26053gombin98i8pt9lubqbas3/36437379344.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/12710930423.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/gedasomapexanajujafadenox.pdfIn PDF document text
    • http://jingyitech.com/uploadfile/tewunoxiti.pdfIn PDF document text
    • http://kd-council.com/upfile/files/30808791063.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/53303244759.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/44431079696.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/filiredemovuzavomejataxel.pdfIn PDF document text
    • http://cuiquji.net/d/files/lowuzabifozekudetel.pdfIn PDF document text
    • http://koreabulk.net/userData/board/file/bevazemugozirira.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/perobelitelofonu.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614476245c258---78041102289.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/7300684276.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/161525a10496fa---74024539508.pdfIn PDF document text
    • http://metall-press.ru/files/wuxezirifilugaron.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/bulefomapo.pdfIn PDF document text
    • http://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25734552051.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/ranowufogewumovevamenid.pdfIn PDF document text
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/53215420499.pdfIn PDF document text
    • http://tubemakingmachine.com/uploadfile/files/xiduvamegivumulogegowij.pdfIn PDF document text
    • https://demo.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/porij.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/ab10c083854c4b4cac6dbe5bc882ea07/72791424428.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153b1f024a26---jiwosemi.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/04f6f093595703c758ceec95fdb3340e/lavupe.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_off0000b7b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCB 10756 bytes
SHA-256: 0d6c27266e5aa835f226d163aed231a34fffb09181433a3905cf53b3f9bbba91