Malicious PDF — malware analysis report

Static analysis result for SHA-256 f345410463bdf36a…

MALICIOUS

PDF

74.5 KB Created: 2021-02-15 08:53:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a83cbbec7102b4e5287e4633db863e77 SHA-1: 4b0bb14bceda50c0f48a5e85e9765e989b8d4176 SHA-256: f345410463bdf36a155d8b17fb9808bf31f567e1fb6ba731460c5edc5bffb04e
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/aws?utm_term=arifureta+novela+ligera+volumen+8+pdf PDF link annotation
    • http://buytoday.cc/acute_appendicitis_in_pregnancypk5n9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471081/normal_5feb02ae0d6c0.pdfIn PDF document text
    • http://mastericy-chistoty.ru/pokemon_tower_defense_android_apk756sn.pdfIn PDF document text
    • http://effektzhizni.ru/710194692057mn65.pdfIn PDF document text
    • http://liketime.fun/dot_corrective_action_plan_templateeo4t6.pdfIn PDF document text
    • http://servisvds.ru/all_about_me_worksheet_elementarybzd53.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/geign6d/assistant_manager_jobs_houston.pdfIn PDF document text
    • http://housefashion.ru/annabelle_s_homework_piano_sheet_musicmbsow.pdfIn PDF document text
    • https://sozatoma.weebly.com/uploads/1/3/4/4/134484551/4414083.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446016/normal_5ff983dee144e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_5fd160b7e39a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368982/normal_5fccee8fb7222.pdfIn PDF document text
    • https://cdn.sqhk.co/telivagawu/pqgdVid/47890473963.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391915/normal_5fc6dfce00f6a.pdfIn PDF document text
    • http://istlan.space/27239962204uprc1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://bit.ly/ArifuretaNL��������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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C9 5428 bytes
SHA-256: c9c157e29ad4e2fc2d88cdd1913eca2a8c4787dea79599aa05fcb317825fb3f3
font_01_sfnt_off0000d529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD529 1996 bytes
SHA-256: de65fc73a1a76ba9f8fd6f662784af3d11afc01466f3f30e4995424bb52fb3c5
font_02_sfnt_off0000de57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE57 11868 bytes
SHA-256: a019a2c9c48da77df9cb0963cb943b86ed7b513f49f0da9d45ba01f0e41b5c60
font_03_sfnt_off00010561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10561 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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