Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ccefc5f0aa6994…

MALICIOUS

PDF

73.1 KB Created: 2021-09-01 18:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 76f09d9f686813ba3e52d7f6412a99b1 SHA-1: ea4e7c5c0e5fedc6f3ee4488f3ce8178c951dec1 SHA-256: 80ccefc5f0aa6994b6357909b59c41eb2642295113afa31a7abd02a3de0f3299
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern.

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 https://samowar.ch/upload/file/tudami.pdf In PDF document text
    • https://ceccarbotosani.ro/userfiles/file/kiradimasare.pdfIn PDF document text
    • http://mrhobbscoffee.com/images/uploads/file/teranowo.pdfIn PDF document text
    • http://hilltoplancers1975.com/clients/13753/File/71196194040.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/ioaabdo4996qf0skpqd15krv77/gixam.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/7060803183.pdfIn PDF document text
    • http://jorakaygame.com/ckfinder/userfiles/files/juzaxovise.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/24998600037.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160f3152ed8e45---goxafesuribuxilajex.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079014198143---zokekavodunitolajokoxi.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/1b9a81ff37868d9653e0f2b6862e4b2e/64657992520.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c25130c5ba---rasavoki.pdfIn PDF document text
    • http://shinyoungvalve.com/userData/board/file/92150170440.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/84843408da1817156c057f91dbe1193f/21571345565.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/770004c3248f84366bb28a99a6efb766/85437680038.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/vabadakivutifunoju.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/pipabafebewifagar.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/e7af498674629924336377f2d96d2264/wegosidovefadaf.pdfIn PDF document text
    • http://seamacros.com/upload/file/74158102095.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b21e273f74---83672733035.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/zavekama.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/6a3dfaddfc3100cd32b5b2b68ef50c7d/95877433010.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/13d032d40bc068f73b1ef78ea614b106/jesitiwitolikebego.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/5f2dd77696f2d5e81e52027d5f046514/vinibizuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=2+fast+2+furious+online+moviePDF 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_off0000ba6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA6F 10564 bytes
SHA-256: fa1747c224880e8f671638ff3ddf2894ebb4d7511091bf48a7a2d7e47be5e99b
font_01_sfnt_off0000d297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD297 17192 bytes
SHA-256: 0f846a812e590348efb8fa59ae2764a5863e6fed580a127c81a77dc219f72800
font_02_sfnt_off0000ff14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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