Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bfb4eb585bebf5…

MALICIOUS

PDF

106.7 KB Created: 2021-04-03 18:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3c50b4a7f9bf6b7e3d41106dcac930ea SHA-1: dca6e50c0fdd4da3198a981cb1a7a6218ae07ef8 SHA-256: 07bfb4eb585bebf54753ceeb1ed5e785728670e2710500e76ac8f629e3571a9f
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, specifically as a phishing or trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to a search query, reinforcing the phishing pretext.

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://jacksth.ru/award?keyword=paradise+lost+book+9+analysis+pdf PDF link annotation
    • http://xadazobisisim.scienceontheweb.net/accident_causation_theory.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/jghaxRC/xafomepefinuwotumetejox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421058/normal_606516ff0a555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475406/normal_60322b5e41b48.pdfIn PDF document text
    • http://jalosus.mygamesonline.org/body_parts_english_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/mujejadalale/jkNjcaN/kowapabuli.pdfIn PDF document text
    • https://cdn.sqhk.co/jupurutage/Dja9ggY/adsorption_and_desorption.pdfIn PDF document text
    • http://sasawavivar.mygamesonline.org/dojakijewipiwavow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384461/normal_5fda59e59a43c.pdfIn PDF document text
    • http://rewetuxavix.mypressonline.com/passport_application_kenya.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479679/normal_6067a5a599e8f.pdfIn PDF document text
    • https://cdn.sqhk.co/mibupufek/1pmbaje/virus_scan_failed_chrome.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/los_7_puntos_de_la_consulta_anticorrupcin.pdfIn PDF document text
    • http://vilafaned.epizy.com/hand_luggage_rules_liquids.pdfIn PDF document text
    • http://zadumurimigi.epizy.com/27700955219.pdfIn PDF document text
    • http://tukudapig.epizy.com/jokenanisadak.pdfIn PDF document text
    • http://magufabag.rf.gd/does_gluten_affect_diabetes.pdfIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_9b2e8336361d4206884507d47a9f7780.pdf?index=trueIn PDF document text
    • http://gexefafuli.rf.gd/lomorozizimikasaxul.pdfIn PDF document text
    • http://wizebefekeb.epizy.com/58661520694.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_a292911ca93a4ab2ab7ff6d814b2b2b6.pdf?index=trueIn 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_off00016537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16537 5496 bytes
SHA-256: 6b45eb6c970ed94a5a3aa5ee6dbf3883eeeeec919f68afa1539a88f9ce66c717
font_01_sfnt_off000177f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177F6 11144 bytes
SHA-256: ebf1234ae79e600a7752666759d0db5b1ad5af70eb90f6f6aafc3c518bbc45f6

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