Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d416d4bec977b69…

MALICIOUS

PDF

84.7 KB Created: 2021-09-21 11:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 47b2693ea61177af9b28bbd4c5de00c5 SHA-1: 400639901cb8826b99b742585a5bffef6641ddcb SHA-256: 1d416d4bec977b69cb32d201dae67a7bd0e2ef8714b83d053385844598d6e54b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external URIs, many of which point to disposable hosting and appear to be part of a link farm designed to obscure the true destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://coretry.ru/uplcv?utm_term=appium+ios+automation+on+windows PDF link annotation
    • http://farmaciafoglia.eu/userfiles/files/3958354779.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/xilas.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/gulutuwikixude.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161384c09cb2fb---1586095747.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/bekiguzuw.pdfIn PDF document text
    • https://xtremefitksa.com/ckfinder/userfiles/files/dadiloludaj.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/1487172819.pdfIn PDF document text
    • http://xn--c1aejbdnke.xn--p1ai/admin/ckfinder/userfiles/files/9631827398.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/80050564164.pdfIn PDF document text
    • http://desiaussies.com/ckeditor/uploads/files/45908569162.pdfIn PDF document text
    • http://schokofontaene.de/idata/59435290665.pdfIn PDF document text
    • http://clingac.es/d/files/liteliwugixotofoxoman.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/6283930257.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/88412222659.pdfIn PDF document text
    • http://yuanjiangchem.com/upload/files/xokixixafiwaw.pdfIn PDF document text
    • https://automatisme-portail-bordazzi.fr/userfiles/fichiers/15093772290.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/gofixebafujijavuxetiwa.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/viwodud.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/2761208925.pdfIn PDF document text
    • http://turinimoti.com/assets/userfiles/file/zitibixuboraxasovelapa.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16136476d564fe---jubetavedekun.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/wutegorejogowizexuze.pdfIn PDF document text
    • http://csc-020.com/userfiles/file/20210918133422_l7xdot.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_off0000e29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB2 10444 bytes
SHA-256: 2497697cad8841032adb7c655df45dad6ced67ece82f8bc9b188477a3d658630
font_02_sfnt_off00011275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11275 19176 bytes
SHA-256: fc40252d6062dd09b575c04715e1c80bd6b0ab5ebeebbbd478b227480288ebfd