Malicious PDF — malware analysis report

Static analysis result for SHA-256 495c67af62fdd21a…

MALICIOUS

PDF

78.4 KB Created: 2021-03-24 18:25:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42f42911b0d4c5c154ccedc4da7d6ea8 SHA-1: dd54633d71b6317abecef795872b5dbc10278cd2 SHA-256: 495c67af62fdd21a3194dad9288c2a00df4a0fc22effab83d59dd7e9d59a8134
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL `https://resalured.ru/strik?utm_term=how+to+use+samsung+convection+microwave` suggests a phishing or credential harvesting attempt, disguised as helpful information. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful content.

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://resalured.ru/strik?utm_term=how+to+use+samsung+convection+microwave
    • http://yourbigdick.space/benetech_gm100jfsdu.pdf
    • http://komakukamuduwi.iblogger.org/64219867037.pdf
    • http://newoxoxi.mywebcommunity.org/rutulibikubutofasejikig.pdf
    • https://gidigodojuk.weebly.com/uploads/1/3/0/8/130874472/5046469.pdf
    • http://fogafiv.mypressonline.com/brihaspativar_ki_vrat_katha.pdf
    • http://levipek.22web.org/24069064563.pdf
    • http://ronifibofizet.medianewsonline.com/97898612194.pdf
    • http://mir23.xyz/wajulebimeluzuxokunrtto.pdf
    • https://tiseparalav.weebly.com/uploads/1/3/4/7/134735838/508643.pdf
    • http://d2-club.ru/36452508568i9b7.pdf
    • http://bas-vorota.ru/meme_soundboard_2019_pro_apk94ot3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vojemigami.rf.gd/manual_de_taller_chevrolet_aveo_2012_gratis.pdf
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_8461fbb2ee1f4a3c88c0115f865ffeba.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b7c0647d-a010-4a3b-91c9-f0ea32e4edea/44074249515.pdf
    • https://uploads.strikinglycdn.com/files/c5bd48c5-2bac-4f9c-987b-6e2a87392b02/cant_change_default_search_engine_in_chrome.pdf
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_094041d804204f7a91f54fbad8d457e9.pdf?index=true
    • http://wupogegefug.epizy.com/92252207045.pdf
    • https://uploads.strikinglycdn.com/files/92865016-4698-4b22-80ce-debb110c2fe5/descargar_biblia_aramea_en_espaol.pdf
    • https://uploads.strikinglycdn.com/files/f3c99b32-afd0-4e3d-acf7-3caf94841c76/yoga_anatomy_leslie_kaminoff_amy_matthews.pdf
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_c9b201c78a4c4b169c0407f323aa95bb.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_off0000f5f6.bin
231426bbad213e3b0598349ed4652a195fbd3fee7303893b5e10fb6bdb905f11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F6 5200 bytes
font_01_sfnt_off000107ab.bin
f6fe935fc3ee8faa7b26770d5b496a79db9f7d9404644646cb6cff6216d04204		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107AB 11036 bytes

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