Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa989c03e8a0d26b…

MALICIOUS

PDF

78.2 KB Created: 2021-03-14 23:53:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 47eb8796a225c85f387c5dfdd9e02f7b SHA-1: 7fcc403f32df33f9b9e5669ce611ec8b9d6cba1e SHA-256: aa989c03e8a0d26b06d5b0067852077d7a44169b933e4b82c1003f5938eb1099
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to disposable domains, indicating a link farm designed to host malicious content or redirect users. The primary URL, 'https://mezovuduw.ru/wix?keyword=what+is+the+process+of+dissolving+called', suggests a phishing or scam attempt by mimicking a search query. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

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://mezovuduw.ru/wix?keyword=what+is+the+process+of+dissolving+called PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463264/normal_602ec16ee0ce2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495550/normal_5fee2f387991e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376359/normal_60135b8b703bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476750/normal_6032da8b2e47a.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/how_to_redeem_v_bucks_code_on_switch.pdfIn PDF document text
    • http://grampus-shop.com/8725687334si82i.pdfIn PDF document text
    • http://marinarus.space/80654616233olnzi.pdfIn PDF document text
    • http://picsonair.com/tekigekesaxerejininitevvafx1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379029/normal_5fe744f86a401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467325/normal_6013f52728236.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/important_full_forms_of_science.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387712/normal_6016f314d1373.pdfIn PDF document text
    • http://pet-guru.shop/lazupopizuwezepekagaj8tk2u.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/5343e239-3ad9-48ff-aeee-185168d80466/breville_22l_smart_oven_pro_review.pdfIn PDF document text
    • http://nenumagurebe.rf.gd/mijove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d26634aa-f040-48b4-9bf9-a51cc6cd72cd/mujoxenagalaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c0fd807-46a4-46c3-b127-ecfb5594e6dc/vojoparusogopurebomeki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86fad282-2110-4579-a128-05b2b9e3286e/what_channels_are_on_dish_satellite_129.pdfIn PDF document text
    • http://firuwasuwubo.epizy.com/jivani_kartik_nagjibhai_marksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/012fa230-5bb7-4402-b217-6ff9f351b6ad/14505654232.pdfIn PDF document text
    • http://daxilutoxin.rf.gd/magic_bullet_26-piece_blender_set_target.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_off0000f262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF262 5488 bytes
SHA-256: 9ab86004b9e70f171438c5b9356c22686001b24752d1e2b767dc87bd013dd713
font_01_sfnt_off0001051c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051C 11276 bytes
SHA-256: 648961d5bc58bdfff21e79769cdeb669886819330c21d96c9b05533800ea21c6

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