Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f82b01411d4e13…

MALICIOUS

PDF

88.0 KB Created: 2021-09-19 00:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: e9c23a73dd1d4c3651e6d453638507df SHA-1: e3e2fb54a4f0d98444b8add71879b390c2435df5 SHA-256: 49f82b01411d4e137459e669c2f19ec01a5b58c81ca8ddb4c23119aa2d968cc4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to suspicious PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The presence of a 'download button' heuristic further supports a lure-based attack pattern. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/351327451.pdf In PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/jawozanuzerasolawigoxebi.pdfIn PDF document text
    • https://asmitahrgroup.com/ckfinder/userfiles/files/76594601505.pdfIn PDF document text
    • https://domilot.com/uploader/files/27458350433.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/80879463153.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/de303daf78690297a490f3b08862b0e5/43258786877.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/penelu.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/63376989648.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/41029919349.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/difijawesolo.pdfIn PDF document text
    • http://iucecb.com/files/file/zawevatuxidapurizat.pdfIn PDF document text
    • http://royalgroup.at/tmp/53728606292.pdfIn PDF document text
    • https://fminterativa.net/cms/plugins/ckfinder/userfiles/files/70445893129.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/14819925370.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/9171897891.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/ponifudabutetu.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/21080726022.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/lutepokepufi.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130caf5297ff---47804695604.pdfIn PDF document text
    • http://putzlappenborner.at/editor_up/2687844204.pdfIn PDF document text
    • https://equinox-e.com/upload/files/pemawejuzobuxoxewifi.pdfIn PDF document text
    • https://investir-petroleo.pt/ckfinder/userfiles/files/barukuzozaruxuzeji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=x+videostudio+video+editor+apk+2+download+22+o+clockPDF 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_off0000f40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40B 17172 bytes
SHA-256: 572efadf01c8d23b8fa18635aa691c61a161d2ba2cb273f42e10eba21446e84f
font_01_sfnt_off00012036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12036 10980 bytes
SHA-256: 14a2581e7a887fbeedf38a5447d854bc6443341f21cdeac92bc35a9fd7fa2925
font_02_sfnt_off000139ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1