Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cc1b3550ac1819b…

MALICIOUS

PDF

82.0 KB Created: 2021-06-01 02:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03f1549bda2fcf2081bfea4e44b0e52e SHA-1: ba6543ea259978496db584cb45bfa748d17357fc SHA-256: 9cc1b3550ac1819b2a06237f4c8f1ef8a58eb3fe68b326271d74c71a3e31796c
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely intended to redirect the user to a phishing site. The document body, though heavily obfuscated, contains text fragments that may relate to the embedded URL's theme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://huntic.ru/pbw?utm_term=chlamydia+guidelines+cdc
    • https://cdn-cms.f-static.net/uploads/4390383/normal_5fd94c05b6b46.pdf
    • https://fupiledur.weebly.com/uploads/1/3/4/5/134527701/4a675b7ee20.pdf
    • https://medekokimezud.weebly.com/uploads/1/3/4/7/134748457/bcd70a1d57d8ef.pdf
    • https://static.s123-cdn-static.com/uploads/4367302/normal_5fed7476100f5.pdf
    • https://cdn-cms.f-static.net/uploads/4369772/normal_6024acb1c6436.pdf
    • https://woloxujujesif.weebly.com/uploads/1/3/4/7/134716607/xarelosutami.pdf
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/wunugudawosuzazi.pdf
    • https://cdn-cms.f-static.net/uploads/4374203/normal_602944636d97b.pdf
    • https://static.s123-cdn-static-d.com/uploads/4373776/normal_60b3e418dd5e4.pdf
    • https://sesoguxanijiba.weebly.com/uploads/1/3/5/3/135309487/3925648.pdf
    • https://cdn-cms.f-static.net/uploads/4450730/normal_60641a968357a.pdf
    • https://static.s123-cdn-static.com/uploads/4384825/normal_5ff712395bef4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/61d04275-8ffa-400a-89ca-ae81204b88bf/what_is_the_roblox_font_called.pdf
    • http://kolasotosexu.pbworks.com/w/file/fetch/144414129/itouch_air_se_smartwatch_manual.pdf
    • https://uploads.strikinglycdn.com/files/73cef2b9-73f8-4489-9cf6-3f252ac4dfd7/pretty_little_liars_season_2_episode_11_soundtrack.pdf
    • http://wiwedano.pbworks.com/w/file/fetch/144424227/pokemon_fire_red_randomizer_nuzlocke_download.pdf
    • http://wuxikadafi.pbworks.com/w/file/fetch/144414201/resignation_letter_format_in_marathi.pdf
    • https://uploads.strikinglycdn.com/files/45d8f80a-cacc-43a1-93d2-5f16f5e81e6c/ruravibifefigawugifo.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_off00010498.bin
e67e50c60d40ffd8e1b2dafe4a5562538d5f4dbaf6b6a230a69db58315f4d04d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10498 5264 bytes
font_01_sfnt_off00011668.bin
3909c6be390a908318cd0f4eac9dcdf768da4ccf6abce3e4c0ad88908a2685b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x11668 10784 bytes