Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d38eb3cdba3c70…

MALICIOUS

PDF

79.4 KB Created: 2021-09-10 06:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0798a4bdec43cdbe509c4174a51708f8 SHA-1: 785afa238286ee69726ca323a10bd0170ce8d199 SHA-256: e3d38eb3cdba3c70bc93d0866591dae053bc763a71b173d5cfd0f09315c4f664
146 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers also flagged it as malicious. The PDF contains numerous links to external websites, some of which are hosted on domains that appear to be part of a link farm. The presence of a QR code lure, as indicated by the SE_QR_LURE heuristic, further suggests a phishing or redirection attempt. No scripts were extracted, but the overall structure and heuristics point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://chiataiec.com/userfiles/Proj_Name/files/sivilotikisupaduvovuje.pdf In PDF document text
    • http://sahamit.net/userfiles/file/sesakivarexopifipojorog.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/20887789748.pdfIn PDF document text
    • http://mprime.net/ckfinder/userfiles/files/bagelanekipinadogefafo.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/tidokalijawalekabefesu.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///60665272711.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/94826242133.pdfIn PDF document text
    • https://harom.ro/files/file/70258071646.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/bejevemomenixaxedola.pdfIn PDF document text
    • http://soundspace.eu/Upload/file/41835061220.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/dadutuwurelap.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/xerekobafadifawivi.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/unrjh7is5dp8bl9gpnbq72t80c/mirubisejasefur.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/duvawemupaxefukojajafax.pdfIn PDF document text
    • http://masterkontroll.hu/ckfinder/userfiles/files/82995647574.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff7b632830---40820079311.pdfIn PDF document text
    • https://idosekotthonaveresegyhaz.hu/files/files/difiwupapokujonolilewa.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/23330316926.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/51211897380.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/rekemutamamuwarikebot.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/98704230511.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/89866079671.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=javascript+to+generate+qr+codePDF link annotation
    • 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_off0000d229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD229 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA40 10844 bytes
SHA-256: ba834a3726738877954ea405cc979023b01b5ff0163452784fb2cd52e57789ff
font_02_sfnt_off000102e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E7 17420 bytes
SHA-256: fe12662ea84f8f9df489a43566b1a3141d4215139d1c9e8c698d20dc3d67e98f