Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5925873e6ad2f8…

MALICIOUS

PDF

82.6 KB Created: 2021-03-14 19:37:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1cc2d8f404432ff9824341b37dffa5d0 SHA-1: 991b9f2499fd254e7bdf37ae363e555e6adaac27 SHA-256: ab5925873e6ad2f8f1d8d398a4335bf29ce34e8831c1052479727a27dac51669
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful sites. The ClamAV detection and ML classifier strongly indicate malicious content, specifically a phishing or trojan. No scripts were extracted, but the presence of numerous external URIs points towards a phishing or SEO spam attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/strik?utm_term=short+story+on+save+girl+child+in+english PDF link annotation
    • http://nefozufovi.scienceontheweb.net/83842169555.pdfIn PDF document text
    • http://wuroguredogir.getenjoyment.net/nibitefun.pdfIn PDF document text
    • https://dulowufokupi.weebly.com/uploads/1/3/4/4/134495444/mojibewatumatux.pdfIn PDF document text
    • https://pujonavow.weebly.com/uploads/1/3/5/9/135958036/3826da27a24.pdfIn PDF document text
    • http://wimuzawoxi.getenjoyment.net/70848349000.pdfIn PDF document text
    • http://kepuxom.mypressonline.com/totikam.pdfIn PDF document text
    • https://juziwujaxizeze.weebly.com/uploads/1/3/4/6/134685910/4819245.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fikuvine/41041493601.pdfIn PDF document text
    • http://pogetowem.onlinewebshop.net/78070192048.pdfIn PDF document text
    • http://povuputuk.epizy.com/25263122943.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/58684824928.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/weather_report_in_bangalore_this_week.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/877e00c7-187a-417b-a231-194dd32f17f9/how_do_you_write_a_self_evaluation_for_a_performance_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d5d8243-da76-44ce-a7ec-8c8e7a0f5416/regarding_operant_conditioning_which_term_does_not_belong_with_the_others.pdfIn PDF document text
    • http://vinuwivuko.rf.gd/powerflex_4_f005_fault.pdfIn PDF document text
    • http://revobisamapekuz.epizy.com/android_toolbar_title_center_style.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/substitution_method_examples_with_answers.pdfIn PDF document text
    • http://sidimusi.rf.gd/epiphyseal_growth_plate_fractures.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/6037119629.pdfIn PDF document text
    • http://zorogeloma.epizy.com/amy_winehouse_frank_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/lollipop_navigation_bar_apk_no_root.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/blank_retirement_invitation_templates_for_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/saigon_tourist_attractions_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9482401-a712-46e3-b0f8-39a80445c707/bemidukuxixel.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_off00010493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10493 5468 bytes
SHA-256: db53824b7809000a51826c6ffded9cf025664763f8695deeea6f02574d9dd0dc
font_01_sfnt_off0001172c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172C 10984 bytes
SHA-256: 42055cb97f11a3899419794b887cdf84cea0f9be56e8abcac92d3b725d113b19

Open this report in the interactive analyzer, or submit your own file for analysis.