Malicious PDF — malware analysis report

Static analysis result for SHA-256 3209738f6d3f6b7f…

MALICIOUS

PDF

71.8 KB Created: 2021-09-11 02:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2d80756a9b2acd3c37132a325b25e73c SHA-1: f1d6407707f06b9583bcf56b692499bd5d643644 SHA-256: 3209738f6d3f6b7fdb20b416b92e72fe6a00848455c27fdb6f894294a787ca34
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous external URIs and is identified as a link farm, suggesting a phishing or malware distribution attempt. The presence of 'cmd.com/data/files/puvilebaxurezoporuz.pdf' in the document text hints at potential command execution or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://medvor.ru/uplcv?utm_term=offroad+outlaws+mod+apk PDF link annotation
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/tujuzebixezibimizapu.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/94442934458.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee345496e6---14306593667.pdfIn PDF document text
    • http://manu-transport.com/documents/file/5271369497.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/17326257275.pdfIn PDF document text
    • https://giasidaily.com/uploads/userfiles/file/90201234913.pdfIn PDF document text
    • http://chongqinghaohong.com/upload/files/bedomi.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/4803563410.pdfIn PDF document text
    • http://ilink.pl/userfiles/file/56266550203.pdfIn PDF document text
    • https://sdudyogtechnologies.in/ckfinder/userfiles/files/12303218595.pdfIn PDF document text
    • http://4yoga.by/pics/files/79377846905.pdfIn PDF document text
    • https://yaofangpeixun.com/upload/files/jutezosurag.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/20994784868.pdfIn PDF document text
    • http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2933313406.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/09/10/9509859661.pdfIn PDF document text
    • http://greddy.com/admin/common/ckfinder/userfiles/File/86225857109.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/lafidesalufawodomekupivo.pdfIn PDF document text
    • http://cowmoo.org/ckfinder/userfiles/files/77301838371.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/rujujixezugexewa.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/12688803227.pdfIn PDF document text
    • http://qdcmd.com/data/files/puvilebaxurezoporuz.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b959c8cf3f---mikija.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/52047733687.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/tazexul.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/69181270050.pdfIn PDF document text
    • http://www.onekadIn macro / runtime command snippet
    • 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_off0000b59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB59A 10636 bytes
SHA-256: 8b56995945f0dcb5087947d5082eda49d54e4f3dc1382fcc7095ed87b7317b33
font_01_sfnt_off0000ce14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE626 16992 bytes
SHA-256: f5d203d56b9dadf258b0aa55391c9eae49456cc91606b2d93ce4ed19e872c3cc