Malicious PDF — malware analysis report

Static analysis result for SHA-256 e15d0f7e76ea1d8d…

MALICIOUS

PDF

74.3 KB Created: 2021-03-14 20:13:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b20f6f2e653ef7e5bebd8948df3a990 SHA-1: 28f2f1083f84834fc6123221acddf320c096b11f SHA-256: e15d0f7e76ea1d8d5c5c2092ced54b06a79797ace9bc5b27db74bcd4e5846d6f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious content. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary URL, 'https://resalured.ru/123?utm_term=video+trimmer+for+windows+7+free', is likely part of a social engineering lure to trick users into downloading or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://resalured.ru/123?utm_term=video+trimmer+for+windows+7+free
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5fe7a06c7ba7b.pdf
    • https://cdn-cms.f-static.net/uploads/4451227/normal_5fe8f75f51675.pdf
    • https://cdn.sqhk.co/fekolisuzub/3kfijji/wexalevug.pdf
    • https://cdn-cms.f-static.net/uploads/4423136/normal_603865803bcea.pdf
    • https://cdn-cms.f-static.net/uploads/4447497/normal_604491f1720e6.pdf
    • https://cdn-cms.f-static.net/uploads/4413243/normal_5fdc89ee87d97.pdf
    • https://ximabetewu.weebly.com/uploads/1/3/1/3/131384229/lasobunaruluj.pdf
    • https://cdn.sqhk.co/wubunepan/ahhWHha/free_space_combat_simulator.pdf
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/jetawibafil_wesomeniru.pdf
    • https://lurofigugibax.weebly.com/uploads/1/3/4/6/134686006/16be7.pdf
    • https://static.s123-cdn-static.com/uploads/4408471/normal_5fcc01d9db5c2.pdf
    • http://wivevemeb.scienceontheweb.net/18770369337.pdf
    • https://cdn.sqhk.co/pemejurove/ehcRjgY/rutuzikom.pdf
    • https://wexotagupoma.weebly.com/uploads/1/3/2/8/132814474/bituwuvita_jijam_gegezezadusetad.pdf
    • https://cdn.sqhk.co/bipokagiti/ihaWNQT/fulupowobozubolutoxej.pdf
    • https://cdn-cms.f-static.net/uploads/4422136/normal_604120a0d0133.pdf
    • https://cdn-cms.f-static.net/uploads/4381737/normal_60395c9bbaffe.pdf
    • https://rebagobu.weebly.com/uploads/1/3/4/2/134265419/roxabok-javuseraj-bolavujofa-lawipapivesigat.pdf
    • https://cdn.sqhk.co/tixukiko/KK5jdgd/fruit_cut_3d_mod_apk_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d039c3eb-0377-4301-8d45-d4469e34cc6a/badekelogi.pdf
    • https://uploads.strikinglycdn.com/files/36549a9f-66b3-48ed-aa7d-6176a4cc6c36/49964663843.pdf
    • https://uploads.strikinglycdn.com/files/c464f7ee-57fd-4c5f-9da1-dc1c9a88cf9c/gedixekazes.pdf
    • https://uploads.strikinglycdn.com/files/cf0caf4a-5f3e-4ed4-a951-9745e1538e73/32402772278.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_off0000e5ca.bin
24f1755c80c23dc5f22a506505297b72849ec239620b3e9ee208e4e54f3ed859
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CA 4948 bytes
font_01_sfnt_off0000f6ac.bin
32f3e5b05770022b3c99d2c2cacf767d8c0fade254f58233482eb1ad71e93b1f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AC 10992 bytes