Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6dcb85145ac8a89…

MALICIOUS

PDF

75.9 KB Created: 2021-06-03 09:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b407a7d54f3c5583243039ecf46686e7 SHA-1: 0d616b79ef649d52adde15c7bef5325eac22b281 SHA-256: e6dcb85145ac8a89f0df05626faa2239feb110e11d75570de90435f93e6726d9
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, with one prominent URL, 'https://bologen.ru/123?utm_term=gustine+weather+report', being a likely destination for malicious activity. The document body, though heavily obfuscated, suggests a lure related to a weather report, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://bologen.ru/123?utm_term=gustine+weather+report PDF link annotation
    • https://kenomipijisax.weebly.com/uploads/1/3/3/9/133986884/3497653.pdfIn PDF document text
    • https://lirisuvobuku.weebly.com/uploads/1/3/5/3/135399047/barikeroduvibedafez.pdfIn PDF document text
    • https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/pamutovir.pdfIn PDF document text
    • https://soravetojovon.weebly.com/uploads/1/3/4/8/134890923/gumog.pdfIn PDF document text
    • https://lixuzagaleve.weebly.com/uploads/1/3/0/9/130969249/kokizizilemi.pdfIn PDF document text
    • https://diruwogedow.weebly.com/uploads/1/3/1/3/131382439/wadiwajamu_lutedilala.pdfIn PDF document text
    • https://kixufeme.weebly.com/uploads/1/3/4/0/134018387/kupipewuxat.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://uploads.strikinglycdn.com/files/8f5ad511-b230-4049-871d-b9b6b0ba1707/how_much_do_business_lawyers_cost.pdfIn PDF document text
    • http://noxiwako.pbworks.com/f/74856951871.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/w/file/fetch/144432699/test_form_3a_course_3_chapter_4_functions_answer_key.pdfIn PDF document text
    • http://guronavageba.pbworks.com/f/78569877065.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144417159/pekaxofamesejamositunuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d7bb20a-42b6-4b17-aa7f-5aac5ecea63e/gijifaj.pdfIn PDF document text
    • http://jebodigezev.pbworks.com/w/file/fetch/144512499/9820269585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b65dc6d2-911d-4a32-a2c0-a697dfb52cf9/how_to_hack_in_prison_life_2020.pdfIn PDF document text
    • http://pibadaro.pbworks.com/w/file/fetch/144505185/18690425422.pdfIn PDF document text
    • http://banusiv.pbworks.com/w/file/fetch/144480114/luruzuxavikibesi.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/f/gufegejeses.pdfIn PDF document text
    • http://tagexoba.pbworks.com/w/file/fetch/144423459/fke_kontrol_ilkokul_slayt.pdfIn PDF document text
    • http://xelivolofuso.pbworks.com/f/jobipu.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/rebozi.pdfIn PDF document text
    • http://namikikis.pbworks.com/w/file/fetch/144520338/lamekumela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcf557d1-61ae-4774-b6ac-b9ffe673d98b/327845881.pdfIn PDF document text
    • http://xizisimavi.pbworks.com/f/xuzepurebunewiroruwurugas.pdfIn PDF document text
    • http://nigezid.pbworks.com/f/duwagivokuzovizuzaxet.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_off0000de48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE48 4880 bytes
SHA-256: c568e8d0bde54ad59196547f557c4b4e2b7151e973994cdd32a990508ebae39f
font_01_sfnt_off0000eee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE6 10584 bytes
SHA-256: 195fd5968a740634c7446951681fbf705205bb33adda6866635a34b55fe0c8e4
font_02_sfnt_off0001129d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378