Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd2274c847427f0…

MALICIOUS

PDF

81.3 KB Created: 2021-10-05 14:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 908eab6c58457bb6c66bb056e7e119cb SHA-1: 1ff1de5434f3ddf4b8fcba8655dc300ba9d453ce SHA-256: ebd2274c847427f06c90912d684b0e44b68b9a5cbc50b37475f6b67f7483ff06
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on various domains, suggesting a link farm designed to distribute malicious content or phish users. Although no scripts were explicitly extracted, the PDF structure and the nature of the URLs point towards a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://stpatswatertown.org/ckfinder/userfiles/files/13658641977.pdf In PDF document text
    • http://reclameindex.nl/images/uploads/20837998767.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/tagabenomulozaxek.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/defomolalenazatezol.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/17669596060.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/napodavunujitijamijow.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/vadikinazipezemifafirojav.pdfIn PDF document text
    • http://gyn-ordi.at/myPix/file/pufenebedibopawo.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b72ea1f97e---jezafamip.pdfIn PDF document text
    • http://ambartakip.net/belgeler/file/siwamefiwanajuguj.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/vifedomisoxipurubebop.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/03373ba714038789be7fdb4e480a035d/80153681337.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/rumosikufemi.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136d5ad749d4---37976742651.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/4gchas7tmfs5e8q73dp6rjhlq3/19390948538.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/zadupej.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/89382681746.pdfIn PDF document text
    • https://owop.challengersports.com/userfiles/files/43767833350.pdfIn PDF document text
    • http://stroi-sistema.ru/img/79822761959.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/68990275989.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/50276082778.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/74102383097.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=number+to+colorPDF 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_off0000d75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75E 19132 bytes
SHA-256: f1afa1877e9ce0688e3794a66571fad46712fc0774d78b4a0612bdd387db3954
font_01_sfnt_off00010967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10967 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001217e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217E 10084 bytes
SHA-256: cdfe98c1a0d4e4822e4eb7a9f3cfec9794bee9a4d97dd13a861138412bdeac33

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