Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dabc209794f526b…

MALICIOUS

PDF

80.7 KB Created: 2021-04-26 11:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6a582a9b87106233080d788d32bd6e04 SHA-1: e2e34e1e942a1564dc8fb23e44958db9b21a85ab SHA-256: 4dabc209794f526b81aa8929833694637c3a504c491f4bfc82209b8188027281
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=motorola+moto+g6+plus+flip+cover PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464056/normal_60208df392d46.pdfIn PDF document text
    • http://leludezoz.scienceontheweb.net/ropexigew.pdfIn PDF document text
    • https://xoxovumalojiru.weebly.com/uploads/1/3/0/8/130874224/12a9d01.pdfIn PDF document text
    • http://lurubalopare.sportsontheweb.net/41406346295.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387922/normal_5fcb969776e5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407318/normal_5fdc24801c418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485570/normal_5fd3214682b26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387244/normal_5ff9be5d025d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417543/normal_602af016b6c24.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/wifasiduwogis_vobup_tinorir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418368/normal_602382dcd5b55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375344/normal_5fcf3c6e1a558.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419430/normal_5ff304c6b8b1f.pdfIn PDF document text
    • https://xonesomo.weebly.com/uploads/1/3/0/7/130739362/6609621.pdfIn PDF document text
    • https://rabidibizuzej.weebly.com/uploads/1/3/4/6/134648686/1866271.pdfIn PDF document text
    • https://xezagepu.weebly.com/uploads/1/3/4/9/134901129/kanuforu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa4e9ffc-caeb-49d0-b144-b1e3ae85ced6/2004_dodge_ram_1500_idle_air_control_valve.pdfIn PDF document text
    • http://sozizowumideni.rf.gd/zugifoxiwegonapakom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d62d109c-f56c-4c1e-9422-31b2f73996ee/fozuxaxagexekuwubamuguwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13717c29-a926-4269-9e80-81cf5d2bb5fb/60687065394.pdfIn PDF document text
    • http://bapifodog.epizy.com/38120176442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d042688-48a2-4253-ade4-7d9aea9ef0d8/38980568213.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_off0000dda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA7 5552 bytes
SHA-256: 62fcc099b22a587787ce0378379fde2cd6705dbc6880f7885a70f32c9a4454b5
font_01_sfnt_off0000f086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF086 9816 bytes
SHA-256: e131c730bb0add2e2884301ddde7f2a6f0ab0ad8517ba6b7940c3e5af8715dca
font_02_sfnt_off00010ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC3 12460 bytes
SHA-256: bedc6050508b9d5a0c633e9c8370e1c862e8d401ef1497185ecca7d467cf3c56