Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e18eedd90cb04d3…

MALICIOUS

PDF

80.1 KB Created: 2021-03-12 20:45:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8da82bdca2ed5156050189fb9f6b5c44 SHA-1: 92ba7899c566ebd9113fe2a6cee36a71f1e1a314 SHA-256: 8e18eedd90cb04d39068db6fc79a9b6432fd290fa0cd11f6e43d7b22d1edacf8
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 external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a 'lease agreement form', aligning with phishing tactics. The presence of many links on disposable hosting further indicates a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/123?utm_term=lease+agreement+form+zimbabwe+pdf PDF link annotation
    • http://rmk4sale.xyz/32691795431tdqd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408879/normal_5ff01a6e9b899.pdfIn PDF document text
    • https://kapukafasid.weebly.com/uploads/1/3/1/4/131437878/4772d.pdfIn PDF document text
    • http://vkysnaya-eda.site/pesumamilewurefukijazajyyzx.pdfIn PDF document text
    • https://nibowivuxewanu.weebly.com/uploads/1/3/1/3/131379040/c7b2be10a.pdfIn PDF document text
    • http://lofitner.buzz/johnson_seahorse_10_hp_fuel_mixtureq3kvz.pdfIn PDF document text
    • https://cdn.sqhk.co/zumovinej/jimjatA/jekotenopegivaves.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481830/normal_600073bec30d2.pdfIn PDF document text
    • https://cdn.sqhk.co/jomenuluz/hd1hhhS/78284149318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487623/normal_600e035f0dc56.pdfIn PDF document text
    • http://mebel-albero.ru/zombie_squad_game_download_apkpure3myoh.pdfIn PDF document text
    • https://deparabijafepoj.weebly.com/uploads/1/3/4/0/134040416/31648855be03dda.pdfIn PDF document text
    • http://orbitan.fun/ejemplos_del_metodo_dialecticotq807.pdfIn PDF document text
    • http://finansi-7.online/how_to_reset_citizen_e820qajvd.pdfIn PDF document text
    • http://merovew.xyz/58168339053aj8f.pdfIn PDF document text
    • http://wowitaly.pro/romupaliz9a6r8.pdfIn PDF document text
    • http://trend-sales.fun/datud33bao.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370097/normal_5fe783baf3ff1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485828/normal_604679d23fc59.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxumududu/ahgijii/barcode_app_android.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://s3.amazonaws.com/nijosinizo/nabim.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/budget_proposal_template_for_research.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/akg_d5_microphone.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/tojakuvixurena.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_off0000eed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED4 5340 bytes
SHA-256: 714e5a1de74829589e2eee76659c9dba7755c61382e32c720c35dab154c3c8c8
font_01_sfnt_off000100f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F0 10468 bytes
SHA-256: b9c4c5382e3098e8f022df60ec300a9561f873b34dbbb55e043bb8794f75cdb7
font_02_sfnt_off000124c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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