Malicious PDF — malware analysis report

Static analysis result for SHA-256 84883f557cf9c630…

MALICIOUS

PDF

73.9 KB Created: 2021-09-15 14:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2b665cfaf9e857d7c66c2a7b19ef68e7 SHA-1: c5e4421adb656a9d533f164e3ad1c46df58a9ca4 SHA-256: 84883f557cf9c63017ff3c4e9671f24b2667eb6f990f75004c9016e13ee94db9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm designed to direct users to download files, such as 'clash of clans mod apk'. The presence of multiple disposable host links further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 5

  • 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.
  • 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://4bx.pl/public/file/wepakodegetexigox.pdf In PDF document text
    • http://fohow77.ru/upload/file/36860994093.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/duxavarukejosavokorabosa.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/96004422698.pdfIn PDF document text
    • http://irths.com/upload_files/files/xelokojepukepokiduniv.pdfIn PDF document text
    • http://eshop-kocicinadeje.cz/files/file/3785626496.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613932dda8b1f---mowesa.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/59204267393.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/silomatej.pdfIn PDF document text
    • https://phukienbep.net/media/files/47260306119.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/62668243853.pdfIn PDF document text
    • http://border-collie.ru/sites/default/files/file/sivosakaxubajowuz.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/5519492304.pdfIn PDF document text
    • http://www.jobibon.com/admin/userfiles/file/gidoliwujidexuguzeran.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/c6986c5230b59b8cfc21ee82dea91a6a/40749629598.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/56565542070.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/kirifegilixazij.pdfIn PDF document text
    • http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/zumerogugudiruza.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210906_124412.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/10567319315.pdfIn PDF document text
    • https://badrivishal.com/media/56594153318.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/vurorovixosegoxogobegenam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=clash+of+clans+mod+apk+13.369+4PDF 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_off0000b8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8EF 11288 bytes
SHA-256: 964c63162bbf14707e7bec91e02ced8f430e45eae3fc54bc4147fb3bf3fd1755
font_01_sfnt_off0000d34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5F 18272 bytes
SHA-256: 44660783cde3a3b8a4b528ab9a24c0dc3cac2fc0bd479459cc94f41d64025fa9

Open this report in the interactive analyzer, or submit your own file for analysis.