Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6fc4e67c13265f…

MALICIOUS

PDF

72.5 KB Created: 2021-09-22 10:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: e0d0e4d29f3e88374e52cdec9cfb22e2 SHA-1: 11a38c03909918d5177c28270874ece188e6f54d SHA-256: ea6fc4e67c13265fb5f32609bfff1c67858136e52769e14f0915e0f77184f7ce
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to other PDF files hosted on various domains, many of which are flagged as link farms or potentially compromised CMS uploads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these linked documents. The presence of a 'utm_term' parameter in one URL suggests a tracking mechanism common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://iweldbot.com/ckfinder/pho/files/86477737877.pdf In PDF document text
    • http://studioaeditecne.it/userfiles/file/29734017720.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/37529107491.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/86620136827.pdfIn PDF document text
    • https://greenways.at/userfiles/file/podaxuxofivaxiwedunobedal.pdfIn PDF document text
    • http://smartvoicesys.com/userfiles/gokarijevesamu.pdfIn PDF document text
    • http://frutapac.es/ckfinder/userfiles/files/ravowetuja.pdfIn PDF document text
    • http://livestocktool.com/d/files/wudenukesup.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/muxuniboka.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/89795987596.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/fibopotupikuwuke.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/tudosan.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/67413225473.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/momiwufo.pdfIn PDF document text
    • http://attlas.center/userfiles/file/7129880994.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/vixinugebemovudar.pdfIn PDF document text
    • http://e-district.org/userfiles/file/64373132294.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/mamadixiletataroxanemelu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fde03d0f26---24540003840.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/2d2f202bfbd108a1c3eb38b8d1a316d8/36431791258.pdfIn PDF document text
    • http://vanillasky-ch.com/images/files/xemesemenivor.pdfIn PDF document text
    • http://tabletopad.com/images/file/jixapuju.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161301796b4ef4---83323941260.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/26581916591.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=psiphon+free+apkPDF 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_off0000bc3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC3D 16048 bytes
SHA-256: 7be3f39aded32c7c1a5a683c5a4e9467c038c86231c632af2d11ce5e32416f0d
font_01_sfnt_off0000e4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FD 10404 bytes
SHA-256: efb21aac0294b52a2bc2062dabf40addf39ca99b9531e2c6dcc9c80ab1830ea0
font_02_sfnt_off0000fc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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