Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae47ba7e3a8731fe…

MALICIOUS

PDF

73.7 KB Created: 2021-10-01 14:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2119347ed82444661538c7a893598ca7 SHA-1: f0d3eaba64ba21fce7291408502171d380383530 SHA-256: ae47ba7e3a8731fe8f9895d34aace7daf6a39949c689e439973e442f153b2112
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The PDF structure and embedded URLs suggest it is designed to redirect users to malicious websites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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=descargar+altimetro+para+android+gratis PDF link annotation
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614799121d0f7---varewowe.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/xavetatoradipofezu.pdfIn PDF document text
    • http://leruichem.com/upload/files/51136930445.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/70107466372.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/94608052496.pdfIn PDF document text
    • http://insuralead.com/userfiles/file/84535550905.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210927_094954.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/5230250688.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/ruwonujudolenij.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/budirasipovasojaxoloze.pdfIn PDF document text
    • http://shesob.com/file/files/13608632145.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/zomimerexetitikewe.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/77149507031.pdfIn PDF document text
    • http://ktcyy.com/ckfinder/userfiles/files/falamifosarudizewi.pdfIn PDF document text
    • http://makairways.in/home/makairways2017/public_html/dowalumniusa/ckfinder/userfiles/files/xatipopojuju.pdfIn PDF document text
    • https://hung168.tw/UserFiles/files/rolenarom.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/kibuvubodexumeko.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/jonafagoz.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/86679350004.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/62194319860.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150c31069e2c---7795005107.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/94795023715.pdfIn PDF document text
    • http://strandedtattoo.net/file/vowor.pdfIn PDF document text
    • http://dpnovelty.com/upload/files/92413521470.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/konozujitedawolota.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_off0000b983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB983 10856 bytes
SHA-256: 3f62d3e3d8ed0c5e1d2e4c3ba7f53875817c819da3268f65cfcbd539ef7af224
font_01_sfnt_off0000d25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA70 18448 bytes
SHA-256: e066c89065f3f5a0a6dbec578de72e504edbf6e7b3244881f2c470d629559c98

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