Malicious PDF — malware analysis report

Static analysis result for SHA-256 54cdaca94ece1f66…

MALICIOUS

PDF

86.1 KB Created: 2021-09-18 06:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dd6a69279a7d15c31bef357ffef43617 SHA-1: dfaaea7c2d16cee071ce375b906542ff80e10421 SHA-256: 54cdaca94ece1f6653ac23a5c2fd82dc694b2ecfeb0d1fb1dc080c0f307acf55
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. Heuristics indicate it functions as a link farm and a callback phishing lure, prompting users to call a phone number for fraudulent purposes. While no scripts were directly extracted, the PDF structure and heuristic firings suggest an intent to deceive users into initiating contact, likely leading to further social engineering or financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jufinolofadotetixibovafol.pdf In PDF document text
    • https://greenline.bg/userfiles/file/14477949586.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/degenufazavomulunevax.pdfIn PDF document text
    • http://ivankrivanek.com/userfiles/file/sisezebuk.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/zukupinima.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/98771826520.pdfIn PDF document text
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/26453566735.pdfIn PDF document text
    • http://bonezi.morefriendship.com/upload/files/fafadipadom.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/32078608009.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/sofezupelolizo.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/munobelubefetiwisabobuti.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161305eb4f27fa---48195657510.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/19652651125.pdfIn PDF document text
    • http://tradotel-riviera.com/file/17698124036.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/26318500120.pdfIn PDF document text
    • https://mimpishio1bet.net/contents/files/tofevomonivinibopo.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/ligeviz.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/57183507621.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/7ca5b206bb26c391382f33f0e82d1ba6/1492104718.pdfIn PDF document text
    • http://begues.mobi/userfiles/file/kitidosaniwaralu.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/wewitibamijukofololubo.pdfIn PDF document text
    • http://gleb777.com/fck_upload/file/55598183465.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=tuck+everlasting+pdf+full+bookPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CD 18388 bytes
SHA-256: 69e921b81f6c0ee467d9ced2a9cdaf3e1490cfba2ad2bc1859ab62792987809a
font_01_sfnt_off000118d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EE 11156 bytes
SHA-256: b431d772e7156e83ab3d6c0e264418fce6f27e372f83e72c6c82089adeefca74