Malicious PDF — malware analysis report

Static analysis result for SHA-256 4918ee9ea87cffc8…

MALICIOUS

PDF

77.4 KB Created: 2021-02-04 05:03:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19e80ad60c404f70a4112736854815ae SHA-1: 8a11ef4341b93d663b93c59fd7fb4d2e7c2787eb SHA-256: 4918ee9ea87cffc820206bc7f4239164b2320cca0b3f31b6a1268262e9607b89
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL that mimics a search result, likely intended to trick the user into visiting a malicious site. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wb?keyword=analyzing%20cold%20war%20political%20cartoons%20answers
    • https://static.s123-cdn-static.com/uploads/4454435/normal_5ff5d9c6d6da9.pdf
    • https://powipopes.weebly.com/uploads/1/3/1/4/131406611/a5a7d4.pdf
    • http://italylife.pro/cartoon_couple_wallpaper_hd_for_mobilefialo.pdf
    • https://static.s123-cdn-static.com/uploads/4365624/normal_5ff890339b4a2.pdf
    • http://febanadedej.22web.org/81962488088.pdf
    • https://cdn-cms.f-static.net/uploads/4471085/normal_5fda73bb928f5.pdf
    • http://bnatural.space/77501158579o4qdb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gifesikubelazu.epizy.com/batman_arkham_city_patch_pc.pdf
    • http://juwebud.epizy.com/dyer_maker_drum_sheet.pdf
    • https://s3.amazonaws.com/nupotukig/wadajifulizuxe.pdf
    • http://jatujij.rf.gd/gofetilizagepumesazizug.pdf
    • http://livofos.epizy.com/sasopibawolubisapedenudax.pdf
    • http://suwulinivez.rf.gd/free_adblock_for_firefox.pdf
    • http://xufenazaliwe.epizy.com/vipipexaduwe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef64.bin
c37dd76b318523850dfc08ac7727a46c2291b07a20c3c1e2f356bbeb3a9341f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF64 5472 bytes
font_01_sfnt_off00010238.bin
f73f46cbb9c0de23e7a803604e9e89968f3ce74cfe6fb49c1dca0095bc176272		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10238 11288 bytes

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