Malicious PDF — malware analysis report

Static analysis result for SHA-256 c347c902cc20d16f…

MALICIOUS

PDF

80.1 KB Created: 2021-09-03 17:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f043c176d4e60cf3aecbf2db65e4c703 SHA-1: 2d3a6c1ac0ed2a1db2f95752d3971da6a49b3f39 SHA-256: c347c902cc20d16f73cc3812f434cd229c5be1284bea4bffae4e23fb2b978ad8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with multiple URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of an embedded JavaScript stream further supports malicious intent, likely to redirect users or execute further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/mu58i0utn6fj3e36veqlstbv73/gufisavotosirosodadifana.pdf In PDF document text
    • http://keemunblacktea.cn/uploads/file/111327105401.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/oomljm2hfnhijgc5ijttlqopathsno63/16152341657.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/dapeligogunikekoposadapav.pdfIn PDF document text
    • https://pepsima.biz/files/file/91386528996.pdfIn PDF document text
    • https://sarvodayasamaj.uk/upload/files/ziludasetepiweramejum.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/fh8jfnar0n6m6i9s08t473im14/niridikome.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c5df4618485548b2a375560a120db94a/10195534877.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/10ee42ac8db69be08754077c43c3526d/35590974076.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/lajiz.pdfIn PDF document text
    • http://regalmotors-jp.com/js/upload/files/41244910871.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161250e9b948be---9549679532.pdfIn PDF document text
    • http://industrialdevices.in/uploads/pasalodopixefu.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/rutataf.pdfIn PDF document text
    • https://koratspring.com/upload/file/4313602111.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/nolefigibodizevoxob.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/fbocpa2kio9aoqhdr3esm67asv/56404352293.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e61aa89833d---21068886106.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/filikefapipulidil.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/42586592094.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f19402ff3f---padarasoporegu.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f053238ead---desotarevebijifezamikana.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=remove+pages+from+pdf+onlinePDF 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_off0000d495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD495 10852 bytes
SHA-256: 1e7c6f784cbc7931b2f75dfe6e2bfb3a2b81cf942ea0f0f5ca55fd727bce5d83
font_01_sfnt_off0000ed61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED61 17584 bytes
SHA-256: d5550c8dec90f4b4941436c477b5c43f95688380a58802328d6b4813fb17f287
font_02_sfnt_off00011aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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