Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe7da31c785a1b6…

MALICIOUS

PDF

70.0 KB Created: 2021-09-25 09:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: da379752066b24bd7b4160002e848142 SHA-1: 4df382260e69e9259ff41e983adc306a8820a337 SHA-256: ffe7da31c785a1b6d435d231df976fcaba8ce07e82c5ab622f098263b41d31fa
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model assigned a high probability of maliciousness. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The 'SE_CALLBACK_LURE' heuristic indicates it may be attempting to trick users into calling a fraudulent support number. No scripts were extracted, but the presence of multiple external URIs and the overall heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://thepnguyentran.vn/media/ftp/file/54027875376.pdf In PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/kaxafasukefagonukakisos.pdfIn PDF document text
    • http://synowka.pl/galeria/file/surukopevimetotapazix.pdfIn PDF document text
    • http://sanxuatbanthinghiem.org/app/webroot/uploads/files/61570866148.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c38675b604---1121410531.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/45906779050.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/96928997269.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/tadolo.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/23002899965.pdfIn PDF document text
    • https://taybaite.com/userfiles/file/36376549075.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/84638454389.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/zumopegigiduvawesidimi.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///92609802667.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/53605880114.pdfIn PDF document text
    • http://clingac.es/d/files/32640756801.pdfIn PDF document text
    • http://edeins.com/userfiles/file/31981959101.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/1j2q1qm2g6n64ihnqrrdb1ns76/faluwugonivilokemebe.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/terofobuf.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/kividujubozerazider.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/65537828127.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/jowalupuxosegesakobunoroj.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/4561494221.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/3eue8rdh6sjgt1qu0vrrd3c9t6/wejupebisegokemujodo.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/dusatabudulotajejovitakof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=zombie+frontier+sniper+unlimited+moneyPDF 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_off0000b357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB357 15104 bytes
SHA-256: cbb106b5141dc2e31a23889d458f9253b0fba38ef58b662aa6c68f29a8b1fc9e
font_01_sfnt_off0000d94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94A 10816 bytes
SHA-256: df1afce5b6804ff305bc49f474bb53e49f9c3a931b05980af2c9458626d8f095
font_02_sfnt_off0000f202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF202 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.