Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e8a9a25289e3b8…

MALICIOUS

PDF

92.5 KB Created: 2021-02-20 03:59:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 9c0c7708c270864f2d926dd068e26786 SHA-1: 55c4ac12e26fd53f705383b388255f0bad88c630 SHA-256: 09e8a9a25289e3b81bc77800c4717ec5695db5dca11b8ad7b4e8f2e19f915b63
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, with several pointing to disposable hosting and potentially acting as link farms or redirects. The document body, though heavily obfuscated, contains keywords related to 'classic wow' and appears to be a lure to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=best+priest+macros+classic+wow PDF link annotation
    • http://qrastenmap.online/seamless_bible_study_bookjjt18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444623/normal_60248b032f563.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380528/normal_5ffe3028e3c84.pdfIn PDF document text
    • http://present-mag.ru/golf_my_way_jack8jqlv.pdfIn PDF document text
    • https://cdn.sqhk.co/diwamukef/ih5Axeq/asgard_s_wrath_steam_release.pdfIn PDF document text
    • https://tipowunukal.weebly.com/uploads/1/3/4/3/134355136/a3328319.pdfIn PDF document text
    • http://kpovli.ru/ems_med_math_practiceaonys.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/94hcxma/bekudejotiruwogupubigo.pdfIn PDF document text
    • https://viliwefat.weebly.com/uploads/1/3/1/0/131069961/fekibet_febumagoxaka.pdfIn PDF document text
    • https://xupijologa.weebly.com/uploads/1/3/5/3/135327862/4877590.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/gc5MLZt/mikepu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xapijifas/appserv_win_7_32bit.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/nigewaforimusojadival.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12876 5220 bytes
SHA-256: be46e8d2fcc09be5bb105ddccbf07c2d7a8ed71ae46d1b5907756b4613cdaab3
font_01_sfnt_off00013a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A30 13292 bytes
SHA-256: f8fb27ec9ea3d498a1e5f2d3963405e785e6bc4464e4d3f9d43add8ea576ac6d

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