Malicious PDF — malware analysis report

Static analysis result for SHA-256 c399e10e7bbfc402…

MALICIOUS

PDF

75.8 KB Created: 2021-04-11 21:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9371a6c408879d5727c81b6c7c03fa61 SHA-1: 548b553e156c4f616ea26cb46eb278f467dda475 SHA-256: c399e10e7bbfc4023451ffc18f7ea2f635b10417b845d72c261ee397d8d866f5
186 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 0.9997

Heuristics 6

  • 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.
  • 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://gimoguvi.ru/strik?utm_term=python+scripting+tutorialspoint PDF link annotation
    • https://cdn.sqhk.co/dalegoti/igjjuji/vodafone_unlimited_talktime_plans_in_delhi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464065/normal_603aba2e0d41c.pdfIn PDF document text
    • https://pazivumamitobe.weebly.com/uploads/1/3/0/7/130739218/7e76507850173d.pdfIn PDF document text
    • https://cdn.sqhk.co/zedozomi/giheRhh/56699767499.pdfIn PDF document text
    • https://zutomufafet.weebly.com/uploads/1/3/1/6/131607254/jobonut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465719/normal_606d9a3452a1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503033/normal_5fe1a55c5bb50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487662/normal_5fd83d6bb2440.pdfIn PDF document text
    • https://jaginozowelizuf.weebly.com/uploads/1/3/4/7/134729204/luxofidajan-fexaronebu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470537/normal_5fce0ea5b19e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418369/normal_602aec92941fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469378/normal_60335c8c75c45.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/kufazete/rounding_decimals_worksheet_5th.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87478bbe-49b9-4599-8971-acc8b6a0400f/65446519904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2629e83-208c-40c9-a797-b22befeb72c6/types_of_machine_learning_tutorial_point.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e9af29-ed97-4283-b563-163bcc2b192a/71899309380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e9e4365-ed0e-4b54-aef8-559757d50460/97123041451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b89763eb-c41f-4fb3-991c-e52b9351a0a0/mitibuxutoxuvijelekuvojo.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/dotolifafi.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/78968800045.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_off0000ec07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC07 5296 bytes
SHA-256: 2eaae90ec7c37db9cceff599dff3342e62ac4d28d6e0e56545d5499314db45b3
font_01_sfnt_off0000fe10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE10 10540 bytes
SHA-256: 9c4b555f75ec5b0c4a9f0824c711bbd1f73f05bd0aeceb473706dbb087c34708

Open this report in the interactive analyzer, or submit your own file for analysis.