Malicious PDF — malware analysis report

Static analysis result for SHA-256 f76233625c25f21b…

MALICIOUS

PDF

79.2 KB Created: 2021-03-21 02:56:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 88fd52ab7c833b854bad0382969ee3d7 SHA-1: b9715a68efd2087ca3c3a432f935b77259953ae8 SHA-256: f76233625c25f21b2336d92635725653158d65cd3cf91295ac08cdf915732af2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs and is flagged by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, appears to reference 'Whirlpool fridge replacement drawers', suggesting a lure to trick users into clicking the malicious link.

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://jacksth.ru/strik?utm_term=whirlpool+fridge+replacement+drawers PDF link annotation
    • https://cdn.sqhk.co/wisaputal/gqtjij7/color_picker_procreate_5x.pdfIn PDF document text
    • https://cdn.sqhk.co/xomakonezema/oJgj00M/carpentry_tools_list_with_pictures.pdfIn PDF document text
    • http://fuxutigox.mypressonline.com/87034223825.pdfIn PDF document text
    • http://fumodowovud.iblogger.org/61815712370.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/Dz2mjj7/winter_warrior_parka_long.pdfIn PDF document text
    • http://defokozixeral.sportsontheweb.net/15491461527.pdfIn PDF document text
    • http://xovekofetovo.66ghz.com/68461501002.pdfIn PDF document text
    • http://wofoweniwer.iblogger.org/bezuxebu.pdfIn PDF document text
    • https://cdn.sqhk.co/kusedesomawa/RowGjj3/36478160111.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_5aa4e765f9a34425a5e622bb3b0f7697.pdf?index=trueIn PDF document text
    • http://kazuzaj.epizy.com/ahmadou_bamba_livre.pdfIn PDF document text
    • http://varoniwarovez.rf.gd/war_ambience_sound.pdfIn PDF document text
    • http://romefapum.rf.gd/30501711449.pdfIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_a32f94f4ec344e04b21f348eaecc7856.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e67f1503-83b5-4a96-b934-4d9faf4ed887/tejasinit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b51650be-2c50-4433-9b9d-6f58b182b4a7/galewa.pdfIn PDF document text
    • https://1237a3da-0b33-4890-9ba9-974507bf2590.filesusr.com/ugd/3e0cb9_d392a59e24ea4a8e810c2e948c0ca605.pdf?index=trueIn PDF document text
    • http://fidegaf.atwebpages.com/vuteterinubob.pdfIn PDF document text
    • http://rorobifelajew.rf.gd/livre_pour_apprendre_l_espagnol.pdfIn PDF document text
    • http://mogowekuweda.epizy.com/6019081753.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF268 5676 bytes
SHA-256: 13fb2252981fbf69e661837d22c793be0cb090b15d5dabfa14cd3edc663fce1a
font_01_sfnt_off000105a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A6 12548 bytes
SHA-256: 17bb8e4e67539f82d18c675d5e18c7909f8b84a2fac0f0a92caa2e27a9e8a16e

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