Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb904f3dca78aca…

MALICIOUS

PDF

89.7 KB Created: 2021-02-18 00:16:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fa1625a888e0d436bcc6d94e7bcdb97b SHA-1: 9f67ec6bd4cd8a5b925b926d0770d82721179bd6 SHA-256: 7cb904f3dca78aca121836f38ea1d48caa1a952bf592b3f4c867a93ab0f4e564
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/123?utm_term=what+are+the+5+stages+of+embryonic+development PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455684/normal_5ff0d78aa26c2.pdfIn PDF document text
    • http://im-marceting.site/salvage_the_bones_download0l912.pdfIn PDF document text
    • http://cleaner-inn.club/69093815921b5ap0.pdfIn PDF document text
    • http://trellos.fun/nvidia_geforce_game_ready_driver_download68ejx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481408/normal_5fe2c272c18af.pdfIn PDF document text
    • http://todayit.pro/dokopumevezegeduwixugvpw4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373757/normal_601d39aa0fcb4.pdfIn PDF document text
    • http://nulonelam.66ghz.com/88172518511.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pipaneku/hungarian_rhapsody_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/bitcoin_mining_android_app_review.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/65463737756.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/enlighten_crossword_puzzle_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/nujigu.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/78287774935.pdfIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/corrugated_stainless_steel_sheet_uk.pdfIn PDF document text
    • http://taxisariwoboduz.epizy.com/5269746324.pdfIn PDF document text
    • http://japotegalavig.epizy.com/35005237375.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/rutifigowibe.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/camera_raw_plugin_photoshop_cs6.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11024 5796 bytes
SHA-256: cf95be803bca52f5e5cd2679351efcda94b44f25758db3d68bf0bb4e7cc1637d
font_01_sfnt_off000123cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CF 11520 bytes
SHA-256: 0b095e0d29abf7d32cb2fdce8c1e646f27c23ddf5714b30c3caad5e8c688bb2b
font_02_sfnt_off00014aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AAA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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