Malicious PDF — malware analysis report

Static analysis result for SHA-256 746e11daa85c1b07…

MALICIOUS

PDF

82.7 KB Created: 2021-09-12 12:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bee3bf5b7f1cf497b47e65c0781f2499 SHA-1: af1ae250783f766bea2a74633128c18359cbb094 SHA-256: 746e11daa85c1b07fb80ea589a44113a468d0dc95c3e4829862599a7c0f7d0da
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to other PDF files, suggesting it acts as a dropper or part of a link farm designed to distribute malware. The presence of a 'utm_term=police+radio+apk' in one URL hints at a lure for users seeking specific applications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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.
  • 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://heritagecambodiatravel.com/userfiles/file/86964818338.pdf In PDF document text
    • http://sdes.in/uploads/gobubizusegapimim.pdfIn PDF document text
    • https://koratspring.com/upload/file/zapovemimexukezununo.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/dimamabujisozumiw.pdfIn PDF document text
    • http://pronobile.com/catalog/file/78904148384.pdfIn PDF document text
    • http://ranch.pl/files/file/zetira.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/firidawuwez.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/52411018860.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/zodezezaxuz.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/90739223292.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea01f8516c---jojiwilolonegodiwamub.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/98720102919.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/tiroxobopijomivuguzu.pdfIn PDF document text
    • http://chixue.com/uploadfile/file/20210902053457.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210903042830752.pdfIn PDF document text
    • https://dichvuketoanvn.org/uploads/files/barejuvolameredal.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/mituvitoko.pdfIn PDF document text
    • http://i-akparat.kz/ckfinder/userfiles/files/71899666276.pdfIn PDF document text
    • https://gitedu.in/ckfinder/userfiles/files/41105230930.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/48515678837.pdfIn PDF document text
    • http://eros-arena.name/eros/userfiles/file/sagesamap.pdfIn PDF document text
    • http://guowangcable.com/d/files/10899663617.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/62700029689.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdc937388e---96763295380.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=police+radio+apkPDF 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_off0000e004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE004 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81B 10228 bytes
SHA-256: 08be93c0e815cfea39f0950c5f543b715b86b50fa10371e7494a24b43750e802
font_02_sfnt_off00010f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1A 17960 bytes
SHA-256: 911a937390fec183ebc51db977d966af50318a3250083f4d87dad322671ce9b6

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