Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f370d0334a64216…

MALICIOUS

PDF

96.6 KB Created: 2021-03-13 22:59:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b136d534cd800e326a5cd4a09c9d75d SHA-1: 795736fd7ce0466840b33385b66b12ee5a04028f SHA-256: 9f370d0334a6421657d4c1ff4e6c1280574880fd4ae9240fc06ed01f39f4fda1
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 pointing to 'nipisod.ru', which is likely used to deliver a secondary payload or redirect to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'safety precautions in welding workshop pdf', indicating a social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/123?utm_term=safety+precautions+in+welding+workshop+pdf
    • https://gebejisidimi.weebly.com/uploads/1/3/5/3/135302949/5046472.pdf
    • https://zoponexe.weebly.com/uploads/1/3/1/6/131606878/1271d8e1a4d27.pdf
    • http://devlp.design/how_to_repair_iphone_4s_home_buttonxuxlu.pdf
    • https://nejalebemenogun.weebly.com/uploads/1/3/1/0/131070187/bulogibi-xogates.pdf
    • http://testvvd.xyz/adam_khoo_forex_tradingbpykz.pdf
    • http://bezprovodov.guru/25384260825zzahl.pdf
    • http://bachanalytics.com/bible_quiz_on_genesis_chapter_1524qjl.pdf
    • https://jetabasujupeg.weebly.com/uploads/1/3/4/7/134703241/5173847.pdf
    • https://sizegetode.weebly.com/uploads/1/3/4/3/134309939/4652605.pdf
    • https://cdn.sqhk.co/delotijuw/Uihilic/23375510340.pdf
    • http://dobomepederu.22web.org/r_s_letter_whatsapp_status_video.pdf
    • https://cdn.sqhk.co/mujutuzidip/ltKOGHm/99073549758.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jodonurinifos.epizy.com/bowers_and_wilkins_zeppelin_repair_manual.pdf
    • http://sapifux.epizy.com/english_pronunciation_guide_for_beginners.pdf
    • http://kafafisizufol.rf.gd/miss_peregrine_book_set.pdf
    • https://s3.amazonaws.com/gopifu/26606312860.pdf
    • http://ruzowedomox.epizy.com/wenisazosuneverot.pdf
    • https://s3.amazonaws.com/julexekubaj/online_bachelorette_itinerary_template.pdf
    • http://wuresuju.epizy.com/71900713975.pdf
    • https://s3.amazonaws.com/xajowu/how_to_learn_korean_language_fast_online.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_off00013d4a.bin
2683eedda0de6fa01fbd0330518a698c42b3ac3b3cc92f8895255aa1018cfbd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D4A 5776 bytes
font_01_sfnt_off0001510d.bin
a9491c4e68ee0e5b8abae065efa96d4d0b3ba1d82e295f46a84b6b1b0f1abd5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1510D 10524 bytes