Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa9d8a669dce783…

MALICIOUS

PDF

107.0 KB Created: 2021-04-25 19:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 318e0f3c17108836909f88544c194d87 SHA-1: 96c443bef45bd0108dad0398134a84056b3da45d SHA-256: 2aa9d8a669dce783fc43e362bc253cf168e8848cd212c72da3b6ed3ac99dde97
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 0.9998

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 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://lozipotod.ru/strik?utm_term=what+does+app+mean+on+a+spectrum+cable+box PDF link annotation
    • http://dunodipike.sportsontheweb.net/365_days_of_keto_diet_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/xafazunusa/9ifDhhS/84406816832.pdfIn PDF document text
    • http://ueuniti.website/smash_bros_ultimate_tier_list_august_2020nule1.pdfIn PDF document text
    • http://kmplitka.shop/691205580697rgym.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/PVFiahb/coloring_pages_coloring_book.pdfIn PDF document text
    • http://makelemeg.mygamesonline.org/sisuvu.pdfIn PDF document text
    • http://tekplafond.xyz/baldurs_gate_3_next_classes_and_races26ok0.pdfIn PDF document text
    • http://rovanenafet.getenjoyment.net/how_to_use_rapid_diagnostic_test.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/3d_printing_and_additive_manufacturing.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/gdicqjP/rushmore_mall_shooting.pdfIn PDF document text
    • https://cdn.sqhk.co/banamasuvaj/gjrijji/woforuwokora.pdfIn PDF document text
    • https://cdn.sqhk.co/ribegibonot/iihhyjd/best_way_to_video_call_android_to_iphone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4a4396ae-02a1-4862-a143-8ccb3bef97cf/46006189549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41bc0a7e-aaf4-4cf2-9171-66215477e8b9/votubupirenumovezo.pdfIn PDF document text
    • http://xurosuforudev.atwebpages.com/dubai_map_with_attractions.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/antisocial_personality_disorder_test.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/33311587134.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_off000154c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154C5 5368 bytes
SHA-256: 782077458804a62e5c3f752749e954734c35bc0915cc31a2f7bd1ede2a9c13b9
font_01_sfnt_off000166e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166E3 12132 bytes
SHA-256: 879ff585392c7f24c719674b5b3333c369236492d584f26e6a6084493d1bdace
font_02_sfnt_off00019026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19026 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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