Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8c9603f7dbe090…

MALICIOUS

PDF

67.8 KB Created: 2021-03-17 02:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bc946d4ac960ddd5dddf1880dc7be0f SHA-1: 6561be89db2a94d5c282d939b73658c8197d13c2 SHA-256: ae8c9603f7dbe090ad8b47410ea4d8b98b35b853dbd8ee79b544d6192a5e4da3
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV signature and an ML classifier, indicating a phishing attempt. The embedded URL, 'https://resalured.ru/wix?keyword=ffa+manual+scavenger+hunt+worksheet', is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'scavenger hunt worksheet'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/wix?keyword=ffa+manual+scavenger+hunt+worksheet
    • https://cdn-cms.f-static.net/uploads/4465924/normal_6018889aab706.pdf
    • https://static.s123-cdn-static.com/uploads/4408704/normal_5fe210e15366a.pdf
    • https://cdn-cms.f-static.net/uploads/4412396/normal_602be86121e2b.pdf
    • http://future-techno.ru/aj_hack_no_surveyqhws3.pdf
    • http://akb54.ru/lepigogexebilwhqw.pdf
    • https://cdn-cms.f-static.net/uploads/4366401/normal_60378c8702cc9.pdf
    • https://static.s123-cdn-static.com/uploads/4423471/normal_5fd069118ad6c.pdf
    • https://cdn-cms.f-static.net/uploads/4489988/normal_60461e156a56a.pdf
    • https://static.s123-cdn-static.com/uploads/4464522/normal_5ffb442a2f8f8.pdf
    • https://cdn-cms.f-static.net/uploads/4379233/normal_5fe9050911415.pdf
    • http://resimpub.com/730442317476uney.pdf
    • https://cdn-cms.f-static.net/uploads/4459170/normal_602b836963a52.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_a943d858c00347499dc70650738152cd.pdf?index=true
    • http://vemaxuvigufu.epizy.com/dbx_160x_vs_160xt.pdf
    • http://vevaxadebelag.epizy.com/mugalubanakijexo.pdf
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_405e318f45734a1e910cdcb2a9491176.pdf?index=true
    • https://s3.amazonaws.com/tugafebip/durapodudunetena.pdf
    • https://s3.amazonaws.com/zunaporam/40728532411.pdf
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_a04bea41dab94316a8259204b1938a81.pdf?index=true
    • http://tamazodatitemi.epizy.com/66016217486.pdf
    • https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_ef021bf77f2b48788a2a6b399ff8b788.pdf?index=true
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_69e3258591554035ba3afe4434b0d27b.pdf?index=true
    • 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_off0000ca24.bin
71dc8315a41d3034630a6ca1f2f5317db4b32605c62a53ab37b780bac8c1299b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA24 5468 bytes
font_01_sfnt_off0000dcb2.bin
09686e744ee3c1a508a77661005061ad26aceb936d052ce251b9c352ecb7bf49		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB2 10432 bytes

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