Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaeb20f9606182e0…

MALICIOUS

PDF

84.4 KB Created: 2021-09-18 23:38:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1c2825571eaeb3c4f2c4e1c78a14de70 SHA-1: 92b1ce421f67a57a699d2ac0cd9c1771d600f6ec SHA-256: eaeb20f9606182e00ba4b92f4a25f10cce4c6c76c5286f6d2be14b4567c570a1
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://allytemp.ru/uplcv?utm_term=best+apps+to+hack+games+on+android PDF link annotation
    • http://bularz-auto.pl/images/userfiles/file/31271915470.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/cq2q0tu4s0ijc1hmbtsnikl1v8/87982306599.pdfIn PDF document text
    • https://iword.de/userfiles/file/47508091438.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/raboz.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613478a99f607---fezezudugexoges.pdfIn PDF document text
    • http://playonathletics.com/userfiles/file/59456604734.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614273016c98e---21855452128.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210915120243558632pihhx9.pdfIn PDF document text
    • https://superpart.com/files/ritagubafenofobafam.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/76c9c9ab2f358161ce87cb446ac5dee9/domukofevefuvinitovogif.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/36744840273.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/78339409858.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/12048125972.pdfIn PDF document text
    • http://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/barasofalofomalejifaken.pdfIn PDF document text
    • http://progetec.org/userfiles/files/88970708323.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/rufutixuvivoru.pdfIn PDF document text
    • https://edouardweil.com/userfiles/file/jolemonateburulisolef.pdfIn PDF document text
    • http://short-story.ru/upload/file/69521724817.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user//file/_0879931001630998922.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/39240095731.pdfIn PDF document text
    • https://austarpharma.austarchina.com/upload/files/tewalige.pdfIn PDF document text
    • https://hometutorsdelhi.com/userfiles/files/88718034155.pdfIn PDF document text
    • https://rsebolivia.org/userfiles/file/nunedogoxotevamo.pdfIn PDF document text
    • https://signatureshreyas.in/userfiles/file/42879913401.pdfIn PDF document text
    • 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_off0000e1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E2 18644 bytes
SHA-256: d989e319e4aefc57aa2bcb7216e5ef0d06630600c5f2946d0fdf21ef35c9850b
font_01_sfnt_off00011243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11243 11060 bytes
SHA-256: 20cb6ba369e5ad82682dbe8f6d37ae2ddbdc6a850e5c0f90b73c09bb815d071e
font_02_sfnt_off00012bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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