Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6e5e043fc388d2…

MALICIOUS

PDF

87.3 KB Created: 2021-09-15 23:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9152dd46760013a5748e170008e8e3e4 SHA-1: dbd970dddcbecc1eb553d0131bc9def1e64d2e4f SHA-256: 9f6e5e043fc388d244c489ba373c47d78fccc11146719746964e2a7a2dd81f2a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous domains, many of which appear to be compromised CMS uploads or disposable hosting, suggesting an attempt to direct users to phishing or malware distribution sites. The primary attack pattern involves leveraging these links to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://irlanc.ru/uplcv?utm_term=structure+of+meristematic+tissue PDF link annotation
    • http://artiguardia.pl/userfiles/file/zijez.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141680895612---wukigodafudosesoguto.pdfIn PDF document text
    • http://filippodelvita.com/demo/userfiles/file/torukirepebarotuba.pdfIn PDF document text
    • http://djk-winkel.de/images/uploads/file/pikujakomoxafekotamev.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/6641971193.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/melixaxamupadexaweken.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/zasokijovedozapukumit.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/bofudademepigasapiku.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613562e39a97e---37998749355.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/pisumofin.pdfIn PDF document text
    • http://moderncarrent.com/user_img/files/58935693800.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/baworaloji.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210914102600.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/xodatuduzulavefikug.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/40365283749.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/82100715371.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/rasumokubutelovuzilimavin.pdfIn PDF document text
    • http://fpole.ru/sadm_files/jobarel.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613f786252063---makokoxeresuleduvediseput.pdfIn PDF document text
    • https://themis-lex.com/userfiles/files/punudidatipewajomamuwe.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/fobeliwe.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16140fdf531100---lazijidowimibekokafexu.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/161377c12a4bd6---69475530670.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_off0000f14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14F 17660 bytes
SHA-256: 0b195ad9172d68c5a4ee542b325a7a36b02cbc82d323956a57de52a93c51a96f
font_01_sfnt_off00011f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13762 10524 bytes
SHA-256: 3ff83e063faab5ce51febac620ff7c6972e1725cc6e17b734685f2870aa164d6

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