Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3aa70279628e8f5…

MALICIOUS

PDF

84.5 KB Created: 2020-11-25 22:39:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ba4623d6ba83abccf185d5d6a6e9353d SHA-1: d957a1680d9f9c302ed70865aff56eb68b04bd37 SHA-256: d3aa70279628e8f5a3a7ad21b21df28b15a14aa9d76b581cb2a6dbe2320867ac
156 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 0.9998

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 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.
  • 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://traffking.ru/aws?utm_term=game+commando+behind+enemy+lines+2 PDF link annotation
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/vaxukekiwurefebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373526/normal_5f89a3381b966.pdfIn PDF document text
    • https://wojawafelufofux.weebly.com/uploads/1/3/0/8/130813934/4661938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379856/normal_5fa0d00c9de3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377381/normal_5fbdff1b7d6c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_5fa13260eb3a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422382/normal_5fa6642b1c14d.pdfIn PDF document text
    • https://kexinebig.weebly.com/uploads/1/3/4/3/134338338/rowegakazomi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_5f91f547a3566.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/gozilum/resonance_of_benzene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/332f7419-f81c-4726-92e0-0c0ce469a221/33655234561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb6b22d6-7f9f-49e8-97f5-85e07bdf11d6/wenapusomi.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/5054179237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20820bcb-35ce-4ec5-93d5-8a90191ea8c2/cheats_pokemon_Smaragd_GBA_GBA_games.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_off00010f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0D 5488 bytes
SHA-256: 58ffdc1d031e975aefbaf857d3263af1a3d2a73561cae538e0685678a1338f1d
font_01_sfnt_off00012199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12199 10440 bytes
SHA-256: fe05a539281aa24540605dfb902680f15a1c0f98662c96694fe302a747670ccc

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