Malicious PDF — malware analysis report

Static analysis result for SHA-256 1adac42e300def28…

MALICIOUS

PDF

85.7 KB Created: 2021-09-19 04:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: b21c344d8711e246c8782b63c63bf9d6 SHA-1: aee652d18e9148f4e5700a113b382d4ea9dcd550 SHA-256: 1adac42e300def286823ac19c9aab1ba62af8ed693ca66ce39e2b5f1188f8784
134 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to domains that appear to be part of a link farm, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious workflow, likely involving social engineering to trick users into clicking on links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://targhevaticane.it/userfiles/files/80603680829.pdf In PDF document text
    • https://fundacjanadzieja.com/images/wyswig_images/file/76343469015.pdfIn PDF document text
    • https://garnet-medical.com/userfiles/files/26470153674.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/tugilakejokikejofijiw.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/tiginarenelabamezojesur.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/33556617419.pdfIn PDF document text
    • http://fructusartis.com/i/File/gesijakakodenidenoki.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/49519754400.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/zotitibitaf.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/jefemuf.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/simanuguvatiwemomamej.pdfIn PDF document text
    • https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/puxivenogadejelutivus.pdfIn PDF document text
    • http://fitviewer.biz/files/file/suserexisabajedomu.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/gemovirizekuvelazetegijon.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/bovizabukaxazuf.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/fikonugurixofegapaxelorum.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/34907259593.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/48078822140.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/99255664161.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/wigoziturenagibulonudegin.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161410f2b90662---xigumewexotidinagor.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/masesaluz.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/ragububoxunupaxuzo.pdfIn PDF document text
    • http://namngonviet.com/user-/files/zazapipuzevedagewenulop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=asus+themes+for+androidPDF 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_off0000e8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DE 10656 bytes
SHA-256: aadb62754370cf2c970820eadb7669bb6b5cdc3528f6b05448ac89333e3f2075
font_02_sfnt_off00011923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11923 18508 bytes
SHA-256: 11e3007a3e138e79cad5e0c00d8af7768bb1be8e9b189805e82fa50468d847f6