Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ae275b730ec470…

MALICIOUS

PDF

84.9 KB Created: 2021-05-11 19:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0ba5a1d49da9895ad37281e8767b121c SHA-1: 466175675dd73740b4ce88de430f242d68206607 SHA-256: 24ae275b730ec470b682cbaeaba77e0196bc7dfa6509509f5eff1d44e8e73394
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 trojan. It contains numerous embedded URLs, with one prominent URL directing to a domain associated with malicious activity. The document body, though heavily obfuscated, appears to contain text related to search queries, suggesting a phishing lure.

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://midufefew.ru/strik?utm_term=compare+and+contrast+essay+topics+grade+5 PDF link annotation
    • http://devedilazabu.medianewsonline.com/mabigevugekedojatazegufuv.pdfIn PDF document text
    • http://figedizizexi.22web.org/how_much_does_a_medical_lab_tech_make_in_oklahoma.pdfIn PDF document text
    • http://palubofapejuraw.mywebcommunity.org/when_to_apply_for_fafsa_spring_2021.pdfIn PDF document text
    • http://zelafagilu.iblogger.org/army_adp_study_guide.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/alice_in_chains_unplugged_tab_book.pdfIn PDF document text
    • http://sofoviwov.iblogger.org/85396659283.pdfIn PDF document text
    • http://lukunezevowazol.sportsontheweb.net/java_application_architecture_modularity_patterns_with_examples.pdfIn PDF document text
    • http://jipolavex.medianewsonline.com/project_report_on_waste_water_management.pdfIn PDF document text
    • http://vitodibiwanezej.mypressonline.com/is_divergent_ascendant_on_netflix_usa.pdfIn PDF document text
    • http://bokazisenu.22web.org/morningstar_uk_android_app.pdfIn PDF document text
    • http://baxagaxisatipa.22web.org/free_aptitude_test_with_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fezolal.rf.gd/96737632199.pdfIn PDF document text
    • https://264cdfe8-48fc-440e-bff3-938583425051.filesusr.com/ugd/cd20dc_3dc2da1ed8294a059c098e1a14e7f9b8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sisaxu/29902649682.pdfIn PDF document text
    • http://mepudizik.rf.gd/sikixez.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_f636c3afb160476dbe4b2a77c857ae91.pdf?index=trueIn PDF document text
    • https://1160a196-6e18-49bd-931c-438029629b47.filesusr.com/ugd/40338c_dd1c01ffe7d343da9a17ab636ee8c4bb.pdf?index=trueIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_4e17b25ffedf412284c9b25c084c05a8.pdf?index=trueIn PDF document text
    • http://jusudab.epizy.com/balufapeletevoz.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/temusenu.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_off00010e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6C 5492 bytes
SHA-256: ca02f4d047b6367d57b12d18915b62dae7b7fcb75f2ccb5a4218ce509a7cb8e2
font_01_sfnt_off00012104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12104 10888 bytes
SHA-256: ec2ab531f623e2dee6dadce68b3eef3d0ec19e2e832c7218dcaf3164e11803d9

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