Malicious PDF — malware analysis report

Static analysis result for SHA-256 692ed105cbb6cf9a…

MALICIOUS

PDF

82.6 KB Created: 2021-09-09 13:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ac2debc440aa1ba20f085d786fc478a8 SHA-1: f42a269df8b41b803bfa92d9746a620dd702c50f SHA-256: 692ed105cbb6cf9a4d7fea339104c2af16a8a42904d4d558060b814711873b38
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URIs, including one pointing to a raw IP address, and is described as a link farm on disposable hosting. While no scripts were directly extracted, the presence of embedded URIs and the nature of the heuristics suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.jdconstinc.com/ckfinder/userfiles/files/99969283890.pdf In PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/173913263.pdfIn PDF document text
    • http://homeopathyhk.com/files/futuxegutidigebaju.pdfIn PDF document text
    • http://96stone.ru/userfiles/file/88374493553.pdfIn PDF document text
    • http://alwaysshine.com/fileimage/file/11386010703.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/73918481083.pdfIn PDF document text
    • http://gojjang.com/uploads/files/99518448152.pdfIn PDF document text
    • http://automyjka.pl/automyjka.pl/userfiles/file/29124591746.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/zivilujom.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/vubura.pdfIn PDF document text
    • http://hillcrestneighborhoods.com/userimages/nulukewogizejebepi.pdfIn PDF document text
    • https://portalkucharski.pl/app/webroot/media/files/90683644275.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/53649581264.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/fufawimu.pdfIn PDF document text
    • http://mariancozma.com/_user/file/52918031831.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/64564428150.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/fajiligilubigegaje.pdfIn PDF document text
    • https://intrastorg.com/userfiles/file/pajaxigu.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/11188432192.pdfIn PDF document text
    • http://mextro.de/upload/files/2915150636.pdfIn PDF document text
    • http://yoga-privates.com/yoga-privates/file/97260194241.pdfIn PDF document text
    • http://kuryakyn.ru/userfiles/file/62392303123.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/161308cd9d174d---69609452472.pdfPDF link annotation
    • https://lifeteacher.tw/uploads/files/202109082331495503.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=snaptube+get+the+best+video+and+music+easy+fast+and+freePDF 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_off0000daa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA2 18084 bytes
SHA-256: 1d33812de84b73507070e3ffcd7f45a6d61f429a1e3708a1f6f5394b52412a70
font_01_sfnt_off0001097b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097B 11516 bytes
SHA-256: 259c2804d2e3865e7fbd00e00835b999bbe554a506ac2ad34898a18a3bf03467
font_02_sfnt_off00012434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12434 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1