Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ceda5697aa4d068…

MALICIOUS

PDF

82.7 KB Created: 2021-09-17 06:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d14464034043a774b944249a06258e67 SHA-1: 012ff63f01195f482a41db61dd9b55539ebf64eb SHA-256: 7ceda5697aa4d068894f6aa51b52b1bfdccecd835d897027dd67ff4b3933ec7b
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'SE_CALLBACK_LURE' indicates the document's content is designed to trick users into calling a fraudulent number, a common tactic in phishing and tech-support scams. While no scripts were explicitly extracted, the presence of many external links suggests a potential for further malicious activity or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://grandegroup.net/files/54616567723.pdf In PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/40795592070.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/95738684735.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/1813632847.pdfIn PDF document text
    • http://dinobajka.pl/Upload/file/68801857155.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/31880405972.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/fevekopegofoludafu.pdfIn PDF document text
    • http://quaint-house.com/images/blog/file/33754482269.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/431623946.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/sepogadupigexugujegitud.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/6351894851.pdfIn PDF document text
    • https://machinex-machines.com/UserFiles/File/kesodanofokewive.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/19361676534.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/vajoxinizavejugavolimoxu.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/vigarif.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161318f14779ce---91800121850.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/5158505672.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/53051257598.pdfIn PDF document text
    • https://www.aillant-sur-tholon.com/ckfinder/userfiles/files/10233036698.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/96927791816.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/tamivivuti.pdfIn PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/81825501995.pdfIn PDF document text
    • https://33mobility.net/uploads/files/87144614781.pdfIn PDF document text
    • https://drnanemilk.com/tctt/sites/aaa/file/peputefapupib.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16137237cd41bb---16733499557.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/vonolinekut.pdfIn PDF document text
    • http://forepic.com/_UploadFile/Images/file/zolenilisafojuxorozibajas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=terraria+eye+of+cthuluPDF 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_off0000e11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11C 10336 bytes
SHA-256: e142ac4d274f993990cd6feba79c3ea7831c4f6a348dadd95cde73a0944e7dd5
font_01_sfnt_off0000f894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF894 17084 bytes
SHA-256: 97478bc282ed5da4ef41a6752828f5f100df172871e6185884be555823fc8706
font_02_sfnt_off000124d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1