Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ecab54cf79c2ca7…

MALICIOUS

PDF

75.0 KB Created: 2021-07-06 09:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 9e8bbf388eec02d32ff493ae379b3dd5 SHA-1: 97f55d9253df8f70acd6fb9777d10a8b2405d1f4 SHA-256: 1ecab54cf79c2ca70d3763dd7fb260e0758fd86346d8a1ed65fe1debe16cadfe
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • 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://carparts-fixture.com/file/file/96399751916.pdf In PDF document text
    • https://eyetracking.pl/userfiles/file/vepigofopajup.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/8792c474f4e652ce1699e2093bc4c217/29497850423.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/27492137304.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/sazufevitibo.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7255eda3184f369e6db533366c153ef4/34592589199.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/40656993380.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098668de6933---beragixe.pdfIn PDF document text
    • http://cwesp.biz/upload/file/xunigumazigesasu.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/gu7m1putjk5nsutpj7sb5qdfmc/91282951057.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c101976e7b---fapefesepetilo.pdfIn PDF document text
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/sobimuwazenugeduz.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad37b0871a---gapoferufiguzo.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/44443013320.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/sipumexuwefub.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c038747d9f7---miwikisevafanibemoma.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/wipowesofibono.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0be740038---kuwipanuwusevametiw.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/48317009393.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/44801783627.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606e140ebc4cb---nexurixov.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/14981361661.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/82746542338.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbb913b7d6---duzezobanuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=led+zeppelin+good+times+bad+times+tabPDF 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_off0000c163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC163 16276 bytes
SHA-256: 00cf595905b68a11d9935c3c32567b76ed9e647de656354c4b17e8520d8cdc32
font_01_sfnt_off0000ec25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC25 10792 bytes
SHA-256: 2ec643ce9611d780fc36bc14fd33911fe6c270b8609801d2923c68e7122f6f58
font_02_sfnt_off0001048d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1