Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c575146714f8712…

MALICIOUS

PDF

83.1 KB Created: 2021-09-18 13:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2f4de192bd11ae3baa879cbb005f5357 SHA-1: f4c993a9f7a2538335d804a02d1b3ad136df0b56 SHA-256: 2c575146714f8712f59923460a37d5fdf9f44be23fcb0ebe2594e2bc379f70d3
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious by ML and ClamAV, exhibiting characteristics of a phishing or tech-support scam. It contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious content. The heuristic 'SE_CALLBACK_LURE' specifically indicates the document prompts the user to call a phone number, a common tactic in callback phishing schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • 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://krisoc.ru/uplcv?utm_term=racing+games+friv PDF link annotation
    • http://garankuccu.com/upload/fckimagesfile/4fcf0f0af008cdd0a9f2271087452aaf.pdfIn PDF document text
    • https://agermag.ro/mm/file/fotikujesiga.pdfIn PDF document text
    • http://futboltotal.net/images/files/81754174698.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/gudoverakireruligukubagi.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/c99c3680ff056cc82fac4c05a290a1fe/gejuzotiverasebom.pdfIn PDF document text
    • http://gazetavk.ru/img/file/76084413489.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/5528de07ae31c4050043f14f8d3e10cc/68044218812.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/33068694208.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/d0a4ec54406ea54f8657eeecfcb2d4b0/57867170567.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/supurozumigidaw.pdfIn PDF document text
    • http://klhl.com/userfiles/file/bisokuxasonatedore.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/sipedaledopewar.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/27335108726.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/16988555423.pdfIn PDF document text
    • https://mrpressconsulting.com/UserFiles/file/94537663603.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/jujipilapevalejeparoxegu.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/vikebusuxedanikowalojid.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/32175583532.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/724eca0340f8266491405880ea80d235/kuzakopajagoxubir.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613137b7007c7---51190276925.pdfIn PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/77721588866.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/nanejatuxuwurokifowefami.pdfIn PDF document text
    • http://najlepsietorty.sk/uploads/fck/file/karivazotovanepewidoxipim.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/28092952962.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE085 10528 bytes
SHA-256: bd0bedfaebde228efa9909ad4b39efc23f4e55d348a5cc9d7736cd3e59b11774
font_01_sfnt_off0000f87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11091 18100 bytes
SHA-256: e55d435f23ae30c3517202d830a1fea32a19c8d5dfbef04d67dcb8035df1b946

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