Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc33fe0fb3ba8762…

MALICIOUS

PDF

75.1 KB Created: 2021-09-26 01:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2eb7bfb92f47ed5ba44683551caa8533 SHA-1: ccb750eecfec4bd97914321d986112e6dfa1d9ce SHA-256: cc33fe0fb3ba8762af82d5c388f44f8ba6f83b18d0882c2d154949e797701551
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The 'PDF_IMAGE_LURE' heuristic indicates it's an image-only document designed to trick users into clicking an embedded action. Multiple external URIs were found, many pointing to suspicious domains, suggesting a link farm or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9757

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 75 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://ecotranslation.ca/upload/editor/file/zuzopererewo.pdf In PDF document text
    • http://lecieldesandes.fr/ckfinder/userfiles/files/jizabujuxawasawuwupip.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/55559648179.pdfIn PDF document text
    • http://servmed.net/userfiles/file/peretezovib.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/83749556943.pdfIn PDF document text
    • http://galettedesrois.eu/userfiles/file/49730026177.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/ragejaneguworutelijisujaz.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/ruvixigoropumokifos.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/tepokamevilorofab.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/ruraxubogiw.pdfIn PDF document text
    • http://dongsimkindergarten.com/upload/files/39334000330.pdfIn PDF document text
    • http://kgmda.com/upload/files/40630839633.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/8099731257.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/45250552038.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16132f12c959b8---zitexasuvinividakoga.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/23212805836.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/48103642086.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/subosogid.pdfIn PDF document text
    • https://softwebstar.com/shop/userfiles/file/18697452426.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021090901255973499.pdfIn PDF document text
    • http://eventechsite.com/files/files/zuxolupo.pdfIn PDF document text
    • https://cape-electronics.com/media/file/22026964520.pdfIn PDF document text
    • https://luckyfood.itweald.com/uploads/files/6141ffde4dc1d.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/66027887816.pdfIn PDF document text
    • http://mtsp.by/userfiles/files/69405835551.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/40140264787.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=easy+o+wordsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0BC 9952 bytes
SHA-256: 9591414af94bc9b974c0e4b9488f972f38022a8e90101e9ecc82760e61afea75
font_01_sfnt_off0000c6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E3 14268 bytes
SHA-256: dfbf17114472c30f793f305c1a19cdbca98ec9294030fc7c0da0ff738fe155c9
font_02_sfnt_off0000eabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000102cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CF 18096 bytes
SHA-256: 7328df1dc4a8db6b72138f09078e62efa9cf9fc1a26811c20daa4d0221aa2706