Malicious PDF — malware analysis report

Static analysis result for SHA-256 8437e9303c3e9468…

MALICIOUS

PDF

85.9 KB Created: 2021-09-19 21:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0bc10ee0c39610ea72975a0beefd6d62 SHA-1: 5cc9a9091ca0879f2fed9bc615f44f310960000c SHA-256: 8437e9303c3e9468ecfe2b00a73a361d12282da34a869797fd7331550aeb5aa2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, suggesting it functions as a link farm or redirection mechanism to potentially malicious sites. The PDF structure and embedded URLs align with common phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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.
  • 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://huntic.ru/uplcv?utm_term=blockman+go+unlock+all PDF link annotation
    • https://ritascreation.com/userfiles/file/wixevabemipugezogusoxa.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65010954149.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/94447425606.pdfIn PDF document text
    • http://prestopc.it/upload/file/namer.pdfIn PDF document text
    • https://lifeteacher.tw/uploads/files/202109152147013876.pdfIn PDF document text
    • http://japhina.com/upload/file/vebofupiwatowe.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/file/tezupot.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/belim.pdfIn PDF document text
    • https://ecpa.fr/uploaded/file/77681603879.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/waweluluganemojonaga.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/jonatimude.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6e9a3a203---pavazivonutolepaboz.pdfIn PDF document text
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kidewagumu.pdfIn PDF document text
    • http://ryyw.com/upload/files/2021/09/202109112036094302.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6983ebb48---94327393114.pdfIn PDF document text
    • https://pinkrali.com/calisma2/files/uploads/rixixagoreto.pdfIn PDF document text
    • http://phuclocvienjsc.com/uploads/image/files/74466261764.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/60129041993.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/50697101436.pdfIn PDF document text
    • https://chongtham68.com/app/webroot/uploads/files/rikate.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/84818990250.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/92064981148.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/32710430832.pdfIn PDF document text
    • http://namkhoabacninh.com/images/files/wuxagasenajixom.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/12111630083.pdfIn PDF document text
    • 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_off0000e45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6C 20464 bytes
SHA-256: 1384afb89921e9080a0f7a2d4e073de1c9e3057f724f75d6f659ef79bd8f1606
font_02_sfnt_off000132d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D1 10228 bytes
SHA-256: b0e2650f9d6dd5ef77b2b279b2a73a2d7198141c5a36e1ef6429df30e7a9ee94

Open this report in the interactive analyzer, or submit your own file for analysis.