Malicious PDF — malware analysis report

Static analysis result for SHA-256 2291986985648af2…

MALICIOUS

PDF

81.4 KB Created: 2021-03-18 20:56:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 31dfa9cf763b46adcfe8ce0e967ff20b SHA-1: 14cf6f25d19fd795b018e8418a02c110b1a1b179 SHA-256: 2291986985648af2fb1ef747da178101e2bb2501d2ad8f036dd0f9d5cc308a06
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection techniques.

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://vilenefex.ru/award?keyword=bebop+scale+exercises+pdf PDF link annotation
    • http://islandlandscapesbb.com/repupixexegigogumetasarebdlqnj.pdfIn PDF document text
    • https://nogefarixuri.weebly.com/uploads/1/3/4/6/134647247/e6efbd5.pdfIn PDF document text
    • https://mapevitesofik.weebly.com/uploads/1/3/1/6/131606073/1945571.pdfIn PDF document text
    • https://jugomezaxazodo.weebly.com/uploads/1/3/5/9/135994004/wilaf.pdfIn PDF document text
    • https://kurupatasewa.weebly.com/uploads/1/3/5/9/135958836/9746f5b.pdfIn PDF document text
    • http://urologo.store/dashboard_excel_spreadsheet6wh3v.pdfIn PDF document text
    • https://reropazorulofo.weebly.com/uploads/1/3/4/4/134437501/46941e65b79f339.pdfIn PDF document text
    • http://robolab.one/last_wish_raid_armor_hunterabi9c.pdfIn PDF document text
    • https://ludurodeb.weebly.com/uploads/1/3/4/8/134852143/8373751.pdfIn PDF document text
    • https://boraweterepin.weebly.com/uploads/1/3/4/8/134864111/xuduziberaraxir_sefebe_boworug_kofuwigutomowit.pdfIn PDF document text
    • https://lobumemimakagom.weebly.com/uploads/1/3/3/9/133999871/mugupuvuni-boferalikagig.pdfIn PDF document text
    • https://kelawuduj.weebly.com/uploads/1/3/4/3/134330896/babewojalokejesosefo.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/zobigamycbne.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/1dc0b9d3-a810-450c-a39b-0222c7e65a1e/hp_deskjet_3054a_install.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb2814c-1155-49c2-aa19-612474544db7/what_colours_do_dachshunds_come_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a969020-73fe-442c-8bee-6f970dbe468a/balebumejisevilop.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/kajisa.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/vuvudufowuxagolikupipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb9f1cf6-6c2f-4488-bdec-2a8f9d8d92c4/fomorezalalekuradilerepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba65acd-46c7-43d1-bfe3-a1ea82b4333c/tavepixomogobomusanalis.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_off0000f3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B2 5408 bytes
SHA-256: 711fad381f52c928d993b74e8da2b24e48f7c2cd58a284bf99392fceac8556a2
font_01_sfnt_off0001061a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061A 3020 bytes
SHA-256: 2e9891ae6d5c222eec60b12a73b81bb69387537a489f5d9aca74c65d99ffaf7f
font_02_sfnt_off00011256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11256 11008 bytes
SHA-256: 0395f24fedf7ce952ce3563388e48b2c58fcfd94a2b0f6c59bf1a7624a84a20b

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