Malicious PDF — malware analysis report

Static analysis result for SHA-256 8732a0ee8b5d7dd6…

MALICIOUS

PDF

68.3 KB Created: 2021-09-27 04:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c215834ea9937dce36fe65e5d31b6d59 SHA-1: 3ed66bb3035dacca3cb055debc353523368007e9 SHA-256: 8732a0ee8b5d7dd6b3f2699550a6bc7cecdd2a83165f37babc547bbe81f40ab9
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The PDF contains numerous embedded URLs pointing to external domains, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely to lure users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://crewmak.ru/uplcv?utm_term=how+to+move+things+from+phone+to+memory+card PDF link annotation
    • https://aydin-elektrik.com/resimler/files/72566204044.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/26049469356.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/lubojowivebefil.pdfIn PDF document text
    • https://turystycznapodkowa.pl/userfiles/file/20154055864.pdfIn PDF document text
    • https://interativacorretora.com/fotosempresa/files/36153607250.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/jidivopitudemadigo.pdfIn PDF document text
    • https://www.baust.edu.bd/app/webroot/ckfinder/userfiles/files/25156998702.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/zegodasekoxufewivod.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/mibejezove.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/patovajonujebe.pdfIn PDF document text
    • https://portoggitter.no/content/files/userfiles/file///vunakizofuwibaxejudu.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/30716213175.pdfIn PDF document text
    • https://braveathlete.net/geektic/files/94030418070.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/lugijodadatoki.pdfIn PDF document text
    • http://skupka23.ru/upload/m/87330103058.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/23588035442.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/91458502930.pdfIn PDF document text
    • http://firewaterdamagedfw.com/test/fckeditor/uploadfiles/file/50991540655.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/mabejulu.pdfIn PDF document text
    • http://npas.ru/pic/file/40753289662.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/18629421273.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_off0000ac12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC12 11276 bytes
SHA-256: 6b8198bc8fd281460fd88408fee50e74d3d7d2fe960a2c3b9de33d32b3da440a
font_01_sfnt_off0000c639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC639 15016 bytes
SHA-256: 9c7b667704aa996b313affe6650d13bdf58333cbb82c97c7f88c3b7a32244a9c
font_02_sfnt_off0000ebae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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