Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2722d10b9e756b…

MALICIOUS

PDF

78.1 KB Created: 2021-09-17 15:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2c29cf8f078ec1f787cd085db8036eb0 SHA-1: 8a2d52ca3afa9256cda14e6e82687b55097a9ca4 SHA-256: fa2722d10b9e756b7f33560decf57fc64143c81a5d6f454b6768742aaa647ec2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The heuristic 'SE_BROWSER_INSTALL_LURE' suggests the document's content is designed to trick users into installing malicious browser extensions or updates. While no scripts were directly extracted, the presence of numerous URLs, some hosted on compromised CMS platforms, points to a distribution mechanism for further payloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://abcbyspu.com/ckfinder/images_store/files/xavozoxafezisurexe.pdf In PDF document text
    • https://alpinebadmintonacademy.com/ckfinder/userfiles/files/gefov.pdfIn PDF document text
    • http://antasboru.com/guvennet/resimlerfiles/28363696966.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/dulolefotepikevujupuvigoz.pdfIn PDF document text
    • http://modra-skola.cz/userfiles/file/bamawolokodukipuzezip.pdfIn PDF document text
    • http://corse.annuaire-regional.com/ckfinder/userfiles/files/33298022376.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/9648016532.pdfIn PDF document text
    • http://mskgroup-spb.ru/upload/file/tunajuxixulugudep.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c8a5a7bd7---xalitorogoxegoguxude.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/gezugog.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16135469174be0---vepabobusow.pdfIn PDF document text
    • http://centrons.com/uploaded/file/1495879861613c1dffbf6d4.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16141db0573857---mazamezurubigivezo.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/jopepivekunepeloruxez.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/pavebawiwitexirigagozegin.pdfIn PDF document text
    • http://gibisch.info/files/files/pufixanisalejorilexetas.pdfIn PDF document text
    • http://linhkienhunganh.vn/luutru/files/nadirufobategumabegarev.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/16951378008.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/wokaxobejixakatu.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/37942621484.pdfIn PDF document text
    • http://rvhifi.cz/files/file/2098263064.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210912_63C6AB45449A049B.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/55196564097.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/48630388119.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/92239672550.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=set+up+androidPDF 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_off0000d054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD054 10344 bytes
SHA-256: 25fbc5bd37df6754159fa9d73f661ad6e62efde8b9d295ddf864656337796549
font_01_sfnt_off0000e7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BE 16792 bytes
SHA-256: 765a820ef53cc8624e33b2b94033c01015e49131319783efaf208bb05483eb52
font_02_sfnt_off0001131f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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