Malicious PDF — malware analysis report

Static analysis result for SHA-256 812ffac7447c87d8…

MALICIOUS

PDF

69.3 KB Created: 2021-09-04 06:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4ba23faf334cebf7cfc3286927be5981 SHA-1: 680f6b11fff920edeec165b76f15fcc3748bfcd1 SHA-256: 812ffac7447c87d8854f9e4d45297a6f2f09703f65994b39d457fc3cb615831e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm that points to multiple compromised WordPress sites and disposable hosting, likely serving as a lure to download further malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into visiting malicious sites, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7032

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://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112b506e0701---46251081569.pdf In PDF document text
    • https://airbays.com/userfiles/file/50102405905.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/b4114d23a97529b8bcd6fdc30d8109dc/pawezo.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0900390bf---18177412764.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c274e2100e---6722793617.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/96937476289.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/lufujatumetap.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/37600925432.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/cqu6768mi3tdelb7u2kk46sj9k/tumufekigiwozajudari.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092fe52d5f75---zarulezatujubemezewekixi.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be00deafb6---49465021677.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/22483601132.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/xuwuremukuxexiseliso.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/ffbea47fe751d6128a56b524fca31deb/37694423445.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/0ppc2kf20khedm8aq260bqn231/pivixezewokadadinefowu.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/410570444da4be3bba4e2c5acb136a7b/nawami.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/tezavojakibaxewuvezatiniz.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b13983cf2ad---95925683975.pdfIn PDF document text
    • http://bluedevils59.com/clients/862365/File/53499253461.pdfIn PDF document text
    • http://cosmik-kino.ru/sadm_files/nudikux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=michelle+obama+livro+becoming+pdfPDF link annotation
    • 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_off0000d321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD321 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB38 11000 bytes
SHA-256: c75a7897bac3e626ef9d44abd7d0f5504ccdba3644f5ee437a4313048f88ea51

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