Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb0fed76524b3dd…

MALICIOUS

PDF

71.9 KB Created: 2020-11-23 16:56:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 039070dd6cf2f28a7a6fef99a0ece542 SHA-1: d7ebbb7754b37f2472eb523c6313806b53a67f2c SHA-256: aeb0fed76524b3dd6fee4848cbb110229719f3f50c4f6002235ff970fd99f61b
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 0.9997

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://traffnew.ru/strik?utm_term=kousalya+supraja+rama+mp3+song+free+download PDF link annotation
    • https://rivatuvimib.weebly.com/uploads/1/3/4/4/134469475/aab37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378149/normal_5fa7384da3fba.pdfIn PDF document text
    • https://wajevuwefabebos.weebly.com/uploads/1/3/4/6/134681626/8307306.pdfIn PDF document text
    • https://nobezowav.weebly.com/uploads/1/3/4/4/134461072/nozowozabegonazizeji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382187/normal_5f90cba746364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5f89247536389.pdfIn PDF document text
    • https://sagunuriwofe.weebly.com/uploads/1/3/4/6/134602517/sujuzuf-danitusakawofap-varexasinos-gewelisawiraxa.pdfIn PDF document text
    • https://zubosevofugojat.weebly.com/uploads/1/3/4/3/134307347/kelom_babebularob.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/ee65f361-6eb2-4e26-afb7-92d5aa8b5864/65206791282.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/sajumovime.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/butebakanogomariluzixemon.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/spicy_bobs_italian_express_menu.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_off0000bf41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF41 5764 bytes
SHA-256: 5b9f4548844d1b3d438ac15296e0828a26af4310902cc7d69138befe76a39df8
font_01_sfnt_off0000d2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EE 4716 bytes
SHA-256: 4bbcff943db447b67b9dc7e51fa9414fa6e27206f13ae277a78dedf4470abd2f
font_02_sfnt_off0000e3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BA 14936 bytes
SHA-256: fe5670bd3cab82f1bb9ebe6fd299b4f78d365160ddc481282a478a1043a4c4d3

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