Malicious PDF — malware analysis report

Static analysis result for SHA-256 e442945699d08fe7…

MALICIOUS

PDF

88.9 KB Created: 2021-07-28 00:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8246bed8d2f4d79fee5e7bb15c6e7c0a SHA-1: 48011353383eaf6106fc33a3ad489b91a62b2429 SHA-256: e442945699d08fe762b7dfd42da35114feeef50026d567cf1b757a2dec311a8a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security scanners. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608832febea2c---23482779273.pdf In PDF document text
    • http://aroma--style.net/files/files/11759952135.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b96d83e8e25---29965697170.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/zipubel.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/mirorujidufomasobe.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bec9a3dee0---74076452840.pdfIn PDF document text
    • https://robertbah.si/files/file/rapixevusovopuwikar.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/5cbfe037bcc202dab085b14d293d7477/40037717174.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160888859035d3---81226871348.pdfIn PDF document text
    • https://sklep-pinokio.pl/web/uploads/files/15946296925.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcfc7a6b8b---5739349925.pdfIn PDF document text
    • http://mousike.it/img_ins/files/pewomumibowevo.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731924d4e20---gorefavupinisinemev.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/tapewadumejetelekipoda.pdfIn PDF document text
    • http://zlato-stribro-investice.com/upload/files/gofedote.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/jorepujiwizowepip.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/84022098045.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1399a57fde---54030786763.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/lipagokenurunanaxuguno.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160741b0d4d1a3---bazutov.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ca912b835---teriwedojosalujame.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982ed9e9f75---dikupelajigebire.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/e5j04o8o322d3voqi7g4egc0un/vigovovaxajajudivip.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/kavuveberezirifenis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=descargar+charlie+y+la+fabrica+de+chocolate+espa%C3%B1ol+latino+mp4+megaPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FB 11604 bytes
SHA-256: 526c4540270954c791837f30ed5f5663ffdcc53614126708879dac9af13d3fb5
font_01_sfnt_off0000fbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC4 18384 bytes
SHA-256: 5187f400be3780789a015f91062eabc4c34721288458a1d3cb2047d7edb69a61
font_02_sfnt_off00012b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B07 3504 bytes
SHA-256: 26166b33e8e5ee493e73ee6b21b3d03b913721ae42e2f3b3fa0977959f33946a
font_03_sfnt_off000138ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1