Malicious PDF — malware analysis report

Static analysis result for SHA-256 201a13998860980a…

MALICIOUS

PDF

88.9 KB Created: 2021-08-14 18:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6746e14919e689fcc732590f21e2861a SHA-1: 657a5e148f1312c39562d6329d20a6b16728e705 SHA-256: 201a13998860980afa4a2ea22a7a4b94dcbee39938adb6ee643ccdac1307768d
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to multiple compromised WordPress upload directories. These links likely serve as a distribution mechanism for further malicious content, such as phishing pages or malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608263e53c8a7---94681865613.pdf In PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ac070d3d8---24989758778.pdfIn PDF document text
    • http://bugskin.org/userfiles/file/funefagin.pdfIn PDF document text
    • https://neksav.com/upload/ckfinder/files/70945305821.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/puxujexogakodidej.pdfIn PDF document text
    • http://okulsanmalatya.com/imgup/file/17603907157.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4dc2e77e46---12550877526.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/88cc020528f9c508f277e8d1f9db4c09/fiwaguzezepepagofuboj.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/57319653979.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/kawizor.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837e7409ffc---wibukilum.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/samipibiluzovotobedal.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/xubopuzubofopixevutexi.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e23002192---76154963907.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/234c2060f818bd6f5f0ed671020a2436/kijedomofepup.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c950fd9114---naparuxalefomuv.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/fisipegusad.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/0fdc277c025712a109a7be7cef26035a/pinizo.pdfIn PDF document text
    • http://www.alborada.es/ckfinder/userfiles/files/gegubidomuma.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/ah7rakek54mgovq3prncbsgih7/90390837486.pdfIn PDF document text
    • https://fallsplat.se/file/lubalimalodolasun.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/oqujip41cnoddonibv9omsjih2/9658546004.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=diferen%C3%A7a+das+bacterias+gram+positivas+e+negativasPDF 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_off0000eeec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEC 20392 bytes
SHA-256: 45e45f03b3a6d203d567bc4e703c0f614189d0d219347d57e86b80557d20dbfa
font_01_sfnt_off0001208f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208F 11324 bytes
SHA-256: 502002214b19f1acb36a05cc5deed6302f918f2eaf04f6f69b6b4d76749f0e2b
font_02_sfnt_off00013a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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