Malicious PDF — malware analysis report

Static analysis result for SHA-256 61b2221f06fcc39e…

MALICIOUS

PDF

60.9 KB Created: 2021-09-04 08:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: db1da34a0c40aa492a36e5d5040f2d46 SHA-1: f591ef12f4f2de000f397acff41eaf142c2701c6 SHA-256: 61b2221f06fcc39ebe7c3d82579140746c06576947fef888415b7f82c5439f11
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It functions as a link farm, embedding numerous URLs that point to various websites, many of which appear to be hosted on compromised WordPress installations or disposable domains. The presence of 'utm_term' parameters suggests a phishing or SEO manipulation tactic, aiming to lure users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7492

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://chcial.ru/uplcv?utm_term=research+design+by+creswell+pdf PDF link annotation
    • https://ctsgroups.asia/images/file/divadajenetuxu.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/rapanonokolugejovotalego.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a7d98756a---8616068194.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/48c036ba9feac062e5291495fb7f82fa/vusupobovidexawadig.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/5324f01d4cc56dc3ffa5c8db0d7377e9/bofawetutajozapegedolonob.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/fe121cb81471cb42ba10b59ccc108f37/nekoxiwizip.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850728bb8dd---10943279764.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/sa9ca2tah85i3pl2mcevv90geh/kakesex.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c41259af161---26243111370.pdfIn PDF document text
    • http://sns.hu/_user/file/gajakenifonenukiv.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/gumul.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/najunivunaburomera.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c061871da---54345076050.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/71423902502.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/rapemozevotij.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/80969071206.pdfIn PDF document text
    • https://fitness-sport.it/userfiles/file/mevokolivomi.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a4efcb21b06---82292062212.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/60666871119.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/62341998406.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/81397634116.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC286 11064 bytes
SHA-256: b1942eb406b1bc4f6542beec54ea39cc06e5d3797587efc907d332e748e764d4
font_01_sfnt_off0000dbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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