Malicious PDF — malware analysis report

Static analysis result for SHA-256 80501cd7a0a20c00…

MALICIOUS

PDF

63.7 KB Created: 2021-09-08 22:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c594322d0075859f72de8503eca8e58e SHA-1: ecc7dec52378250c2ab0c284615ca38e52784e7c SHA-256: 80501cd7a0a20c00176331711c6607b009e3c646191879eb9b6dc3d0eb5d1163
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV, specifically as a phishing trojan. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to various websites. Several of these URLs are hosted on compromised WordPress sites or disposable domains, suggesting an intent to lure users to potentially malicious content or phishing pages. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3110

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://garglob.ru/uplcv?utm_term=psx+rom+android PDF link annotation
    • http://fotosvatba.net/userfiles/file/vabakonilesukelemi.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/sitelo.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/lelitarodatoviwabebit.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/161349ba40a8c5---48091012157.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcda35615d---metokokido.pdfIn PDF document text
    • http://spbmedaks.ru/sites/default/files/uploads/80158784698.pdfIn PDF document text
    • http://sswjeans.com/files/58288992937.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210906_AE884584A35F59C0.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/68832228696.pdfIn PDF document text
    • https://www.corpeverest.com/ckfinder/userfiles/files/62012802889.pdfIn PDF document text
    • https://afmiletisim.afmiletisimajansi.info/resimler/files/72865347005.pdfIn PDF document text
    • http://kripasec.com/userfiles/file/misimirefokorawesogasib.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/rogujodeveterazutezaraz.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/jijem.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/lawebuw.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/6e2d975406cda8dba041b8b7cdfc8400/29991533002.pdfIn PDF document text
    • http://lamardaegu.com/upfile/user/file/pitinazev.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/letaga.pdfIn PDF document text
    • http://kcntanduc.vn/img_duhoc/files/93346782226.pdfIn PDF document text
    • http://cpviettin.com/upload/files/11662048087.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/73474364464.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/goxagepamobadowolulabixes.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/b9c0b06cc0e776bbc562a8826f5480c2/32717901154.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/ud65fomg1n7gst3i8qoffrkep1/dirafisiban.pdfIn PDF document text
    • https://vr-spagna-20.effievirtual.com/galeria/files/89450523993.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/texafinisoboludog.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC61A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE31 10236 bytes
SHA-256: e0ce95e5a98ce2a3809a856df68c6c825e8264c8cbb4c2065b8f2fffb8ae31f4