Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc13473d2448f31…

MALICIOUS

PDF

78.0 KB Created: 2021-07-17 19:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c13b90e5936d538d1c50c055fd9bcb7f SHA-1: d3276256cc0c5600aec4e4f5d118227b1d4928f8 SHA-256: 0cc13473d2448f319fb912e8920ac3801164ac8353e217cab27b0073c06353de
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan PDF. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely to host further malicious content or phishing pages. The document body is heavily obfuscated and unreadable, suggesting it is designed to hide its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16073f71b9ec39---zekosuveraxobevam.pdf In PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea986358dc---redutuledug.pdfIn PDF document text
    • http://schs1968.com/clients/861610/File/49886760874.pdfIn PDF document text
    • https://tangente-mag.com/img/file/47071031505.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/dae5dd5fcc10bc6dd52867a561befa54/xekoduwagajuworowit.pdfIn PDF document text
    • https://lymfologi.se/anvandarbilder/221/files/tatumumadevegiwonazetofel.pdfIn PDF document text
    • http://imaginove.eu/data/Files/51591255742.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/90118400970.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b491a423813---kupaxu.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/i0knj487cnvheeq1l7vt9poeh1/84140514943.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bab6a39bfb---niwegazubenuk.pdfIn PDF document text
    • https://bnovum.hu/downloads/16324660091.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160768929798ec---kojipituteporoxixufakufix.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210714_648DD5C3DC93BD3D.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/woxowexaxosefirikumopowuf.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748a50d32c5---fudaj.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607dabaa216ab---divixofuwenefabasasosa.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/95174551433.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a596828cb2---kesiwezebosufagikubuku.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/nifewinunurifagitadiwox.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/zoxewavafumujasibokokimi.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/19c6c6f9e859ff1cafa7358c41b478fa/41320179749.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=tupac+only+god+can+judge+mePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE1 17716 bytes
SHA-256: c517a52d8ac9c1c65eab1f90d7802255fe3bbf9e9060b4d1ca25231bef7698b2
font_01_sfnt_off0000fa6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6E 10708 bytes
SHA-256: a0a15bcf82faf11fd0b0871b59b735445119dffa35960bf17d1fc1f45c050084
font_02_sfnt_off000112d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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