Malicious PDF — malware analysis report

Static analysis result for SHA-256 064bbd76c6f4b48b…

MALICIOUS

PDF

79.8 KB Created: 2021-09-20 06:11:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: dd6252497943520f9c5eaac76875e9a1 SHA-1: 4c4c1706a445cd65379086ed895bd3dd06084f98 SHA-256: 064bbd76c6f4b48b1342488a16d6a1b9060c5a2355b4e3d18bd525b84a30eb39
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggest it is designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/374ceb05c8a47d82bf6fd340ce8050ba/jezuja.pdf In PDF document text
    • http://evola.it/userfiles/files/19217702336.pdfIn PDF document text
    • http://iagclaims.endataclaims.com/ModCoreFilesUploaded/file/56150759817.pdfIn PDF document text
    • http://rsport.eu/yonexshop/static/file/34107408622.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/nonozuvu.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/bereto.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/donixososexazesujagug.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/64217951784.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/54380402930.pdfIn PDF document text
    • https://oriontradecom.com/ckfinder/userfiles/files/92839849084.pdfIn PDF document text
    • http://17njl.com/userfiles/files/94094350377.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media/20185028146.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/348702037.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613932120e4e3---vumigivotigadukalaturuxu.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/xufajopawubazudub.pdfIn PDF document text
    • http://www.prakashirrigation.com/uploads/fck/files/dotima.pdfIn PDF document text
    • http://talleresjpg.es/img/file/22160127637.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/74120477678.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/binudopujutibile.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/14507027380.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/43062239795.pdfIn PDF document text
    • http://www.biosafety.biz/ckfinder/userfiles/files/34436356291.pdfIn PDF document text
    • http://newmob.it/userfiles/files/62996726529.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=quadratic+function+fractionsPDF 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_off0000d238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD238 10452 bytes
SHA-256: 2bdc01b8a14b71e4eb9607d62cb3cd6671495082b707fd126459f886d4169dec
font_01_sfnt_off0000ea1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1E 18364 bytes
SHA-256: a3e6f88a5a19115bcb9e477b1b870fae5e40dfb67c4c8c9bc1c4a4549fb84642
font_02_sfnt_off0001199d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1