Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bdba53c0bd7085…

MALICIOUS

PDF

84.1 KB Created: 2021-09-14 06:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 26142d429cbb25fbbabaf684a02ab146 SHA-1: 577bec0bd213cee13c48a78e7a5e6c3f72e0df1d SHA-256: 07bdba53c0bd70856acd2d907261db4fd5c273e4bc9f3b81a6e9638fb9888717
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links, many pointing to potentially disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and numerous external links are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://kasargod.net/uploads/file/33314980340.pdf In PDF document text
    • http://renknh.com/ckupload/files/vitazifovod.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/99781010022.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/xekefivizaxexixu.pdfIn PDF document text
    • https://renault-service.com/userfiles/rapotisofixif.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/libemodunonepejo.pdfIn PDF document text
    • https://remont-bez-zabot.ru/files/file/dinorajedelus.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/17228749710.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/xigebubawazidatetutos.pdfIn PDF document text
    • http://trunghungplastic.com/luutru/files/82584281802.pdfIn PDF document text
    • http://trevorhannant.com/zoperizawiwefo.pdfIn PDF document text
    • https://hearing-outlet.com/uploads/files/202109101515566275.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16132ff89f05ca---9927143111.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/40890966656.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/21559797499.pdfIn PDF document text
    • https://granitnet.hu/editor_up/likirekoxaxadikuwibebiden.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/3621381671.pdfIn PDF document text
    • http://www.biharikft.hu/bihari-admin/ckfinder/userfiles/files/guxenepawepital.pdfIn PDF document text
    • https://xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/wurinasemajeve.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/84928994024.pdfIn PDF document text
    • https://luatkhangthai.vn/upload/fck/file/85704306227.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/3483368678.pdfIn PDF document text
    • https://hexema.com/FCKeditor/file/92560884089.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/22948592904.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138eb2a012da---34417692003.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=lie+to+me+123moviesPDF 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_off0000e34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 10224 bytes
SHA-256: e8baf92565e51ac8ea050ffb812832897263fe468fb1dbba6d941445cf299975
font_01_sfnt_off0000fa72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11284 18360 bytes
SHA-256: 380f16d79c0198f1c2dcc1e3a199d777a165ebfdc8f5ad909877eb5b4545dd63