Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0401246a8ee8c2…

MALICIOUS

PDF

77.4 KB Created: 2021-07-03 22:41:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9dcac4656b314f5e5bbf3bdb4949b4b4 SHA-1: bb7bf84f8baccb3ba784d5bf633c2450348e00f7 SHA-256: 7d0401246a8ee8c2ff4a0ce405e2a940bed91169a63495e030d215fc9d0719dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other disposable hosting sites. While no scripts were extracted, the structure and URL patterns suggest it is designed to lead users to phishing or malware download pages, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796f9548934---46205632162.pdf In PDF document text
    • http://balogmihaly.hu/UserFiles/file/gugiji.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/70756788985.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/xodigibapojorujawo.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a386d6c29f---murivivetolozanewob.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/79313512474.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/8d55986018e8f406e692361efdba0f7e/jiwubod.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c987a066c28---81065216512.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/dd52a944015e48e668551229966910b7/27146240359.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853158bfd87---segifibarifexumunoxegedoz.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/62917877778.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/gelosuvodatugusogew.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16075a82c11d09---vopovukit.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/396a8a14021f2cf306411e3eaa173f11/nudimawelupaxijojana.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210613165004.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/a939e73eb00ad3d1701c70f56c91f25e/35029531028.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/84872269301.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/volar.pdfIn PDF document text
    • http://imaginove.eu/data/Files/wuvufoxesum.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160daf25bb274f---movusetitepapexiz.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/7938783066.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fda8b6fca9---64078182800.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769a213aef9---55224576734.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=windmill+ginger+brewPDF 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_off0000ca9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9C 10260 bytes
SHA-256: 71bdb4cbb7fa97db4bbed534780799d50ae7d4ecfab4ed8dc0c855028c06af9f
font_01_sfnt_off0000e156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE156 17776 bytes
SHA-256: ddb48fe1789d3a100f9b4f96277cd181a260e5ba313e29b6b3097f95b95af6df
font_02_sfnt_off00010f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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