Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb2155ffe76e7f4…

MALICIOUS

PDF

106.8 KB Created: 2021-09-06 22:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e6d83eb5399207def3eee1e8803c3e1e SHA-1: e70befab64b16d4cfa384d4363fb2b0e7e536f65 SHA-256: 7cb2155ffe76e7f423c9e456c45653c9204339ad19acc582532b8e319bc7a169
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URIs, including links to compromised CMS uploads and link farms on disposable hosting, suggests it's designed to redirect users to malicious sites or potentially download further payloads. The heuristic 'SE_CALLBACK_LURE' strongly indicates a callback phishing or tech-support scam, where the document likely prompts the user to call a fraudulent number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=fomesoutra+bts+pdf PDF link annotation
    • http://geoass.eu/userfiles/files/33453661923.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2bf8b486bc---6118438496.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/88188081636.pdfIn PDF document text
    • http://limoride.net/gallery/file/28101057335.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/q02a5626eugklkm85knlrfpfft/81507085903.pdfIn PDF document text
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/fexafivonabedemeni.pdfIn PDF document text
    • http://velo.hu/UserFiles//file/98643330208.pdfIn PDF document text
    • http://mrcubezpieczenia.pl/app/webroot/media/files/nujemumezu.pdfIn PDF document text
    • https://eagle-aviation.com/userfiles/files/58337048482.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e267aa4e111---82483918092.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/19636666875.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210507111119.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f6e1407cb---17835827230.pdfIn PDF document text
    • https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/xewovovazasipejamobazedep.pdfIn PDF document text
    • http://soyaksiesta3.com/userfiles/file/42436947757.pdfIn PDF document text
    • http://xn--c1aejbdnke.xn--p1ai/admin/ckfinder/userfiles/files/7087919061.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3bf7e38eb---27697781830.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/kakododexibifazuzosibofim.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/22160929648.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/bafalosatozesedebe.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4c8552e76---bojugugujejejukijizopake.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/a600el4c6b3foiq4jt02j57cj6/zijogedejipa.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000132e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF9 22252 bytes
SHA-256: fcc2feab41d8de98e10a5d8fb201a900f48f93d9ef01db29de10985b37343e5e
font_02_sfnt_off00018593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18593 10632 bytes
SHA-256: 2425933c414d15d4980fba925fb300cc5e6e3b28bfa9bc2cfa46be63f707b89b

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