Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b22e4ea75747282…

MALICIOUS

PDF

71.1 KB Created: 2021-09-05 16:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c2b2704eb9c7ad44e40b2aaf32a88938 SHA-1: 7528ab9975f27666e2dbe8b8047c2644f89d70a1 SHA-256: 7b22e4ea7574728246f65e526b19d5f38054bced555367fd68b73d0035d189d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a link farm directing users to multiple URLs, many of which are hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing or malware distribution sites. No scripts were extracted, so the primary attack vector appears to be social engineering via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • 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.
  • 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://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/pne5dd65rqkta5g9s7h3on22j3/mireweroxedekabidafiza.pdf In PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/wifeli.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/fusitipiteponato.pdfIn PDF document text
    • http://maxbrio.kr/files/files/22493358132.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/pl8st5ga3e9c4q1p2p3imeisie/nanatipipiloteketijawemo.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/3a687c9cf3ec105084b65e9ffd92f557/vozuret.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/3052dd133d623e5c0ed0beedd4d06313/99849100743.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/somobubagisuzedu.pdfIn PDF document text
    • http://edwardnugent.com/userfiles/files/29936210103.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/xobodeka.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/a6d533516b03d3dcd9369632bb0db2c9/46185045047.pdfIn PDF document text
    • http://www.childofafrica.org/media/userfiles/file/xalotirure.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cccfde93519---fovaxivosakifaposisa.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/tujuzenodonujowobizegiwu.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/d1e760ad9a6869876a1a8322fdbb9967/rapija.pdfIn PDF document text
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/8p0s7fijtmjrmgitlj73hhlru2/74804589252.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/n11rjitc0o9apes2f71c4otg7a/53846910802.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/sawoxosekonejevem.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aefebd0fd36---76787278590.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16071043b3a914---gilib.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/bezowuwilezuzogikelem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=almirante+byrd+pdfPDF 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_off0000b455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB455 16936 bytes
SHA-256: 2f5950d87118e359eb95dedd01d61a576751030aa225556fcfecc1f6f8e1c468
font_01_sfnt_off0000dee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FC 10608 bytes
SHA-256: d8d72526ad88f27056554c2865af971a34708787158e0a250e3e89f8e27e86ad

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