Malicious PDF — malware analysis report

Static analysis result for SHA-256 06046e20dd7a491b…

MALICIOUS

PDF

80.0 KB Created: 2021-09-21 00:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5ecdd5e1d39607c5119519c6bfc66d18 SHA-1: 239b0b912612c46378505541deae2edbb558c742 SHA-256: 06046e20dd7a491bd5eb98c291c09cf8be804af56e053dc938f272617abad910
176 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. Static analysis revealed numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and a raw IP address further supports this, indicating a likely 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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://laborke.ru/uplcv?utm_term=electric+machinery+and+transformers+3rd+edition+solution+manual+pdf PDF link annotation
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396835b4c92---judidegebigiriw.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/19259072072.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/sogojujovenovewajabab.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/kebuwumonaveru.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be6b83d658---1293177136.pdfIn PDF document text
    • http://www.shjkyq.com/up_files/FCK/file/patozodenaparoj.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/xubuximidetimuzabofeb.pdfPDF link annotation
    • http://villacappuccina.com/userfiles/files/27726854937.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/pijugimelog.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/terovojexu.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/70383257626.pdfIn PDF document text
    • http://proximeo.com/ckfinder/userfiles/files/20618472207.pdfIn PDF document text
    • http://dichvuhieuchuan.com/upload/files/27468118337.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f475a24e08---baboxenu.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/goxagurizujutanulexakofoz.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/kewubesunezupegipijegewu.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/lunapegagor.pdfIn PDF document text
    • http://f1-rennsimulatoren.de/userfiles/file/winulipuxuritisorut.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161472940c4ecf---joxegikojolepikolelekeno.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65933753532.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/zokirekirumumuzafimad.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/lutezujetafilugofuk.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/sixiduzevemaziratiguloge.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/lovarozi.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_off0000ce9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9C 18740 bytes
SHA-256: 2701851bec936ecaabdcb6a14c833bce0b7915f350010f904a317681c84b0a1d
font_01_sfnt_off0000ff6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11782 11252 bytes
SHA-256: 541ad98de19c16e31eac0a7e71fbd56a1a70d47efa5fb00e02c52cf6c517aaa0