Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a69d7973365cec…

MALICIOUS

PDF

79.4 KB Created: 2021-10-25 01:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 0ab2b7958cd87d1d0f2210925d4d8523 SHA-1: 5875dbe6403ae366c01e3dde5b7f9be4c8a0e74f SHA-256: 47a69d7973365cec34a1fa0a86b01a5a95cf9a9f0eda0948c4ce1eebd445da51
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The heuristics reveal it functions as a link farm, hosting numerous links to other PDF files, likely to obscure malicious intent and distribute payloads. The presence of external URIs and a high ML score strongly suggest an attempt to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pevak.info/UserFiles/File/godagawulovowesob.pdf In PDF document text
    • https://walkandsmile.com/userfiles/file/48066873265.pdfIn PDF document text
    • http://karcannakliyat.com/userfiles/file/xujajamigusatogaxiwewa.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/bakafusivanuwasenu.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/87675284566.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/kixobolobugevizirozir.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/1866331160.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/vovinig.pdfIn PDF document text
    • http://sdes.in/uploads/sepowedel.pdfIn PDF document text
    • http://russia-ex.com/images/blog/file/77490591531.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/karuweravugitopu.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/78878205159.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/cc6e99d062e4a9b93250694232e8d5d6/17182865929.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/2479263616.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/13299048678.pdfIn PDF document text
    • http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/fewanopametat.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210925_52797A0A110F366F.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/14602786190.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/22595153782.pdfIn PDF document text
    • http://coolscape.info/images/files/rawokutedur.pdfIn PDF document text
    • https://buyafranchise.org/files/files/8232940111.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/sokiwog.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/1hHberoKktI/uplcv?utm_term=surah+yaseen+full+page+imagePDF link annotation
    • https://forum-auto.ru/data/files/In 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_off0000d113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD113 10876 bytes
SHA-256: cee260602bfb5abebe62f3df3d7433892789871fe2e07f4285bfad2447ee004d
font_01_sfnt_off0000e9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001020f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020F 17968 bytes
SHA-256: d1b17ce29af43f59b11d3aa7078dd816fa28c9738d769ca0ecf953484b2aa090

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