Malicious PDF — malware analysis report

Static analysis result for SHA-256 c42e18bc65951d9f…

MALICIOUS

PDF

74.5 KB Created: 2021-02-14 14:29:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b40ef13ee75f3b37298cf55e9f45ed08 SHA-1: bac1a52025450c6676caef7421787b598d1facee SHA-256: c42e18bc65951d9f653bf155cf710a5a94dbdc32792fa0ade9699863d89893df
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. It contains multiple embedded URLs, one of which, 'https://druttle.ru/wix?keyword=maned+wolf+eating+habits', is directly referenced by a heuristic. The document body, though heavily obfuscated, suggests a lure related to search results or informational content, consistent with phishing or malware distribution tactics. No scripts were extracted, but the presence of external URIs points to a download or redirection mechanism.

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://druttle.ru/wix?keyword=maned+wolf+eating+habits PDF link annotation
    • https://cdn.sqhk.co/mulepava/U8jjzTk/5794117686.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/ggcbghu/women_s_sling_bag_purse_leather.pdfIn PDF document text
    • https://cdn.sqhk.co/pawanipol/aj9ghgj/xoseba.pdfIn PDF document text
    • https://nuwosalu.weebly.com/uploads/1/3/4/4/134497214/zewefutomusiv.pdfIn PDF document text
    • https://cdn.sqhk.co/paleguvebo/fiaZhjS/8600426185.pdfIn PDF document text
    • http://cpskras.website/systemic_lupus_erythematosus_clinical_practice_guidelinesdnnj8.pdfIn PDF document text
    • https://cdn.sqhk.co/vakenuda/ijjfVYT/wolufixijino.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/hdAqhdh/66871765371.pdfIn PDF document text
    • http://info-pages.ru/dalekedimipezegejivazlgjh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lawakux/carousel_horse_craft_template.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/playstation-_2-_bios-_pack._7z_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88D 5308 bytes
SHA-256: 568dc7c8617a1ce199fce65a9bc3b2158202a6b18df8ef861f51266a54f7b8e5
font_01_sfnt_off0000fabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABD 10228 bytes
SHA-256: d865427fe6b1dc21e19f22b029d7084178c68aaf5eff1e7b032da013ac1f32f0