Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7aa9dede103297f…

MALICIOUS

PDF

87.6 KB Created: 2021-09-17 04:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f2bbcf2089843b9083fc36a75abc5e1f SHA-1: 33e225812ef76db412e2067126f00ef0a5f3243f SHA-256: e7aa9dede103297f719c4847805876837ae97cd9853b7e5c3765b14ac2af1a31
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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://queure.ru/uplcv?utm_term=meri+shadi+me+jarur+aana+movie+full+hd PDF link annotation
    • http://stainless-faucet.com/uploads/htmlupload/files/52290596478.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b0afae30e---ruvin.pdfIn PDF document text
    • http://gardena.crazyrockinsushi.com/uploads/files/9134934416.pdfIn PDF document text
    • http://syntrend.critical.tw/upload/files/15108544821.pdfIn PDF document text
    • http://cheapmarkt.com/userfiles/file/57230806200.pdfIn PDF document text
    • https://mediaskills.rs/files/puwikagatapomiz.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/12318013825.pdfIn PDF document text
    • https://deycaterers.com/ckfinder/userfiles/files/22229841680.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210908161804.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/74fca8dfbfcf620c455715155656febf/29118068149.pdfIn PDF document text
    • https://ducthai.vn/userfiles/file/54700838793.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/jokinemaxirexezo.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/18418193814.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/sebewosimorezukekulifej.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/goroxide.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/kibulaxom.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/jurajaxakub.pdfIn PDF document text
    • https://rafaela-motores.com/userfiles/file/tojumanavaxifofekixo.pdfIn PDF document text
    • http://chinahongji.com/d/files/37075380832.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/10141113803.pdfIn PDF document text
    • http://espaciocultivarte.com/ckfinder/userfiles/files/dinulifusuxe.pdfIn PDF document text
    • http://ekvatorbl.com/userfiles/file/89240022319.pdfIn PDF document text
    • https://onderhoudnlgarantie.nl/upload/file/82826972326.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/92081243125.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/17480234900.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_off0000f048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF048 10812 bytes
SHA-256: b5b956a9e2e684f46bf7ad117fae312e94e6661e61e2c90161689ec12bc846ca
font_01_sfnt_off00010902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10902 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12114 18264 bytes
SHA-256: 1ce5d9e2f47d69ed7a5c0bba83c7b098fe91526f18f5dab3aa55853b4f3e8dd7