Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bee0d2fe601aeee…

MALICIOUS

PDF

83.5 KB Created: 2021-09-13 17:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b0ca05af943dd9d22c874108acc97f56 SHA-1: 622228082e3b9b1149e6b31f4ec056d74afcfa46 SHA-256: 0bee0d2fe601aeeee431586ee151e8ee6fa7e32b979f06c2197ff07d6bc6cdf2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, with a high ML classifier score and ClamAV detection indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is designed to host many links on disposable domains, likely to obscure malicious destinations. The embedded JavaScript is a common method for initiating exploits or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://chongqinghaohong.com/upload/files/61437798932.pdf In PDF document text
    • http://citranco.com/users/files/salesufekuvuwexenosisi.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/23341963737.pdfIn PDF document text
    • http://zenobiacultura.it/userfiles/file///55534971682.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/jafalaxebipawavotimiwuxa.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/28825360906.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/1313574932.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/53878175829.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/41301759708.pdfIn PDF document text
    • http://dreesmann-foto.de/userfiles/file/65042199220.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/pipatix.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/4dba1c31d056da06dab4b981b021cb7e/nafadanulatedora.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/15051051533.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/jizidimazojufimubinuzeto.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613005ebd1847---xogako.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/68227119116.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/2042502716.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/legexinalewepalodetibu.pdfIn PDF document text
    • http://tlumacz-francuskiego.pl/userfiles/file/domoxokowumuzesolowawu.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/90938736242.pdfIn PDF document text
    • http://geomanteia.com/userfiles/files/xapatefaroxapelat.pdfIn PDF document text
    • https://protrialse.eu/files/files/40888635118.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/ximelola.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/bagolazise.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/kavab.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/jugowizetarofamajivejudo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=adb+backup+system+imagePDF 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_off0000e2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E1 10912 bytes
SHA-256: 06ddf566992dc8b121b71b5a7bb360d0793ba79c8b70ac96bbd361b8fcb36095
font_01_sfnt_off0000fbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD5 17412 bytes
SHA-256: 19723542b04448588cdee9a0b2c7f024fa8ba394e4031d051c65ab72578be74c
font_02_sfnt_off00012924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12924 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1