Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20fd7dc8d99d7a5…

MALICIOUS

PDF

77.8 KB Created: 2021-03-18 16:54:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ef5b1848ab47a251b08951895aad99fe SHA-1: 47ae7b5456cf2341a7f4b6305b10a61025ab6f5e SHA-256: e20fd7dc8d99d7a5dc4fc17427945a7e4b40a5eabff265c1d244de4f2df2f3f1
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains text related to 'Onion root cell cycle lab answers', indicating a lure to trick users into clicking on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=onion+root+cell+cycle+lab+answers PDF link annotation
    • http://mipedinujit.22web.org/gexibuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473890/normal_6051f1d30f6b0.pdfIn PDF document text
    • https://kusanogiwaxug.weebly.com/uploads/1/3/0/8/130873987/vutakaripalosuji.pdfIn PDF document text
    • http://gudutisiluzew.mypressonline.com/3248574267.pdfIn PDF document text
    • http://zusagukitu.mywebcommunity.org/jivodawimutuwonerutip.pdfIn PDF document text
    • http://palubofapejuraw.mywebcommunity.org/xomaraxurat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469136/normal_5fcc3a015db5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_60192d4721985.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/12291995060.pdfIn PDF document text
    • http://namafafiteg.mypressonline.com/puloda.pdfIn PDF document text
    • https://nebenumepidenok.weebly.com/uploads/1/3/5/3/135307723/rogitut-soriku-womulutogad-ruvarilupofote.pdfIn PDF document text
    • https://nubodizigo.weebly.com/uploads/1/3/5/3/135346475/19e162.pdfIn PDF document text
    • https://favesalaliba.weebly.com/uploads/1/3/1/3/131384568/zabexinanu_nudife_tewepimo_fuvojaxelopabav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491687/normal_5feccc72aca5f.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/ChJqhfz/maxeruzigijuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5fd79e38a5e55.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/8Ehi1jj/ice_cream_machine_frozen_custard_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/panosiritu/J0QaLjc/cake_pop_recipes_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/pigalixow/hdAoXjj/sixeduzewisu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jumawivowibeb.onlinewebshop.net/15099050316.pdfIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/bipilekad.pdfIn PDF document text
    • http://juxirijedatez.rf.gd/breaking_dawn_part_1_soundtrack.pdfIn PDF document text
    • http://movewexa.rf.gd/tuwukifutizuredotiw.pdfIn PDF document text
    • http://vepitejususas.atwebpages.com/37140968966.pdfIn PDF document text
    • http://visevagopar.onlinewebshop.net/77799267725.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_off0000f4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E6 5156 bytes
SHA-256: f7d126c6e958c979d2c7e944cdfd61de0394dcc742bcb8872d9cef92e47161c3
font_01_sfnt_off0001068e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068E 10268 bytes
SHA-256: 2bd24091c0b3b17959fff9b679c0062ad3e4f8602028cac8ba2195c99c94d156

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