Malicious PDF — malware analysis report

Static analysis result for SHA-256 914aa97bf75b88d7…

MALICIOUS

PDF

69.8 KB Created: 2021-09-20 12:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c3fbcc13e7d8c0df86b1e8e92b518865 SHA-1: a15cc930a9368d0382dbbfeaef1a2f71a2a4b451 SHA-256: 914aa97bf75b88d7340a681e3ed9484f6451f3bbbd2fe12affbd4e2b04987a70
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to potentially compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of numerous external links indicates an attempt to lure users away from the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://philabc.ru/uplcv?utm_term=square+root+of+large+numbers PDF link annotation
    • http://haiphongcontest.com/images/files/38899245419.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/87779908165.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/15500252303.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/82913399527.pdfIn PDF document text
    • http://se-ty.com/uploads/userfiles/file/mapawodumoxekukilenup.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/segupoboxopesegamuruxeb.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/brdceuulhnp96r5ocr9825b4mu/72580193132.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16144c29c08e86---88427255083.pdfIn PDF document text
    • https://dom-titan.rs/files/foliladufopokazodif.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/bajeg.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614693d11f020---91502434708.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/manitinonifuk.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/532989121.pdfIn PDF document text
    • https://generalaudit.pl/eurostyl/photos/file/78222084224.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/99862590283.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16135da34e4f29---57840358059.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161354efce71ad---49082289620.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/38543326548.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/gosasiduxomo.pdfIn PDF document text
    • https://mimpishiodua.com/contents/files/52867993720.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/kerogewaxinemigava.pdfIn PDF document text
    • https://majubesar.org/contents/files/26915559662.pdfIn PDF document text
    • https://biodez.lt/i/File/lopojat.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_off0000b202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB202 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA19 10924 bytes
SHA-256: 5c5f8f9739fb42eb04353f714398b9e9aa74b091c44d793a2bd9c386938ef216
font_02_sfnt_off0000e31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31C 15184 bytes
SHA-256: 5c848310f60460ef3aad9a7781afd5b20a056223f4d62d75dfe816785cd96c24

Open this report in the interactive analyzer, or submit your own file for analysis.