Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03e2147a8ab5bef…

MALICIOUS

PDF

79.3 KB Created: 2021-09-17 10:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8627841bd38faa923ed1a767ac7d6eb5 SHA-1: 30fb6d5666a79a02b4380a5ff824c9b343b7abbf SHA-256: b03e2147a8ab5befc7f99fd6440d30b69c7c92474cbfb543a716c3781c3f1e40
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The presence of external URIs and the link farm heuristic strongly suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://archism.ru/uplcv?utm_term=ticwatch+pro+3+price+in+bangladesh PDF link annotation
    • http://studioguatta.it/userfiles/files/65564291378.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/73162883561.pdfIn PDF document text
    • https://ms2oke.com/contents/files/soveliwowisi.pdfIn PDF document text
    • http://geasit.it/userfiles/files/12320892024.pdfIn PDF document text
    • http://tehpromyar.ru/media/file/jefebame.pdfIn PDF document text
    • http://harlit.com/ckfinder/userfiles/files/20210910_081902.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/saxakoziluvaneje.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/24885000296.pdfIn PDF document text
    • http://businessnavigator.in/ckeditor/uploads/files/mixaroparazazufarezasa.pdfIn PDF document text
    • https://middletonchambers.com/ckfinder/userfiles/files/28285995295.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614247f4ba877---14477295518.pdfIn PDF document text
    • http://llux.vn/uploads/files/dotokebalifuveni.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210914100918.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/60370964756.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/basuruj.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/jubasitozesopozasajiwul.pdfIn PDF document text
    • http://rent2day.ca/ci2/userfiles/files/lufoverubokikeseze.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613863b1bcbb7---7868813299.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/saladeviroresov.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/zigalanijolopujuwubasizub.pdfIn PDF document text
    • https://plewmal-d.com/Uploads/files/80502409267.pdfIn PDF document text
    • http://czminghe.com/upload/files/pupikebifexorisoba.pdfIn PDF document text
    • http://drtamerturan.com/file/15727181341.pdfIn PDF document text
    • http://csigikes.hu/admin/fck_upload/file/mimavibenuw.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/6629177908.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_off0000ce62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE62 17888 bytes
SHA-256: 7e8ea90cd62e91af938b9013b0211fb06a75c90a56c97be801d3872554c35d45
font_01_sfnt_off0000fd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11529 11156 bytes
SHA-256: d36064e6bf0e99fa73ec905f25a1a2d93b83b22034831000a9fc08101b4cdc9f