Malicious PDF — malware analysis report

Static analysis result for SHA-256 41d53a1128e864c5…

MALICIOUS

PDF

80.2 KB Created: 2021-03-08 23:08:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0337a9c4777cd31fcf566ad2d4eae892 SHA-1: 57239c2f4e13b57c47dd8fe54c76399e816c3cb8 SHA-256: 41d53a1128e864c5ab7c5f226842e735a0dc1bb0cac51159fe6327132d443ffd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://jottigo.ru/strik?utm_term=skinnytaste+air+fryer+cookbook+table+of+contents PDF link annotation
    • http://1eyvgo.xyz/autocad_2015_filehippomnoxk.pdfIn PDF document text
    • http://boxberry-24.cc/6857138702710i1p.pdfIn PDF document text
    • http://bestita.space/budosabinolazekowi6il4r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445107/normal_5febf57746fd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379726/normal_5ff0c8965c630.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473053/normal_6045c82700504.pdfIn PDF document text
    • http://photoforce.ru/buravomanasupuzamokergds81.pdfIn PDF document text
    • https://cdn.sqhk.co/bulelovuroga/haJiggd/calculate_percentage_increase_decrease_formula_excel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475874/normal_6041b9165cf8d.pdfIn PDF document text
    • http://opsnatur.fun/dwts_cast_rumors_20206496i.pdfIn PDF document text
    • https://cdn.sqhk.co/vasinabew/Qg5jgtb/vofixofaragafuloxetude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_603d1aed9d534.pdfIn PDF document text
    • http://idealicaitalia-official.site/notidowexakmid.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/e0jgchg/fulafakokesasu.pdfIn PDF document text
    • http://lovemecompletely.com/45832950013j2sm0.pdfIn PDF document text
    • http://bridgecommerce.com/11021227050af47l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384048/normal_5fcb1140f2d13.pdfIn PDF document text
    • https://cdn.sqhk.co/tezuzerise/giiSXfJ/66145128781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384048/normal_603852b5745dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7ec6f66-6849-4934-af3d-e0d068843b8d/videbibif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93aa91ee-114d-4927-b9ae-df3a0aeef718/koduredirumozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5c85954-538e-4fdf-8b28-e33ddad2d5e7/how_to_connect_blueparrott_bluetooth_headset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eab5a93-3c22-4945-9c92-5e7ceb7f06b8/eragon_inheritance_cycle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef97e90d-a742-40d5-9807-e2d5a6b2038e/gender_is_burning_questions_of_appropriation_and_subversion_summary.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_off0000f95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95D 5284 bytes
SHA-256: 48d2ec277288509031480444ad25b3565d90cbd0a39ed174a78f67a1e2aefd5c
font_01_sfnt_off00010b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B75 11308 bytes
SHA-256: 2518388440db6792975b24b5496345c2fcd5566f1aec532bed47d4f824464abe

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