Malicious PDF — malware analysis report

Static analysis result for SHA-256 e576b52f9eab79d6…

MALICIOUS

PDF

91.8 KB Created: 2021-02-06 08:56:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 266dcb157b64aaab3b2b4254150ff31f SHA-1: 13f7b6a302884481bebf9685440dcea834959de3 SHA-256: e576b52f9eab79d6ca54fc78bbf7ffdd62da4eb622879a9ff63c523389d46790
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'Update chrome android phone', indicating a lure to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/aws?utm_term=update+chrome+android+phone PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409627/normal_5ff58b0fe0f93.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/jCiebgf/zujexo.pdfIn PDF document text
    • http://topstop.site/pocket_casts_android_autot5e9h.pdfIn PDF document text
    • https://cdn.sqhk.co/pifixijowoka/fic7ibi/connect_the_dots_printable_kindergarten.pdfIn PDF document text
    • http://italylife.pro/togasasantm71g.pdfIn PDF document text
    • http://healsmall.space/16296291278qu3es.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/aAgjhiL/21067986730.pdfIn PDF document text
    • http://labiosdewonda.com/313563118721hhp7.pdfIn PDF document text
    • http://umkatrade.ru/best_keyboard_piano_app_for_pcjx6p8.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/gczSieo/medajumotuwituka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487007/normal_5fd05d489babd.pdfIn PDF document text
    • http://rodigevofu.iblogger.org/wotitesozodurijuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5fd9a2977f66a.pdfIn PDF document text
    • https://fanuterose.weebly.com/uploads/1/3/3/9/133999321/2868018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nepunefetonub.epizy.com/buildbox_activation_code_free.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDE 4880 bytes
SHA-256: cead47fd7091bb5ba5884be71c1e8db8d11e2853f6562a7797151570e6b91d31
font_01_sfnt_off00012f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4C 10700 bytes
SHA-256: fcecb23cc0b5960a0bec22e9c3b44a5ccda2e7f58cad44f25b0ce182ce21adcd
font_02_sfnt_off000153b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153B3 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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