Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca48c01e06cc48f2…

MALICIOUS

PDF

75.9 KB Created: 2021-03-12 00:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 33bc2a2771091b76f57c5682bf36179a SHA-1: 0404fcf994bafefaec3c1b9d3a117b0693d5ed89 SHA-256: ca48c01e06cc48f22f511f31d6b29560bda1a6137d1b5cff4cc3c416c1988631
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated, suggesting a link farm designed to direct users to malicious content. The primary malicious URL identified is 'https://maypoin.ru/strik?utm_term=mississippi+driving+permit+restrictions', which is likely part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=mississippi+driving+permit+restrictions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477626/normal_60089f0f0288c.pdfIn PDF document text
    • https://naxovemunozi.weebly.com/uploads/1/3/5/9/135958864/pexeb_lerosiwupivike_govujajoxikoge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453909/normal_5ff8a56f94c82.pdfIn PDF document text
    • https://xobisopi.weebly.com/uploads/1/3/1/3/131379629/94794d.pdfIn PDF document text
    • https://sojujigun.weebly.com/uploads/1/3/0/9/130969910/porixudajobepok.pdfIn PDF document text
    • https://molesomux.weebly.com/uploads/1/3/2/6/132681378/7729952.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/15b39f5b-b8c6-463e-b777-b26609a7e7ac/pifinikifowedegekuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/cadbury_flake_nutritional_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84e9411-8dfb-4d5b-a978-7ab7f6c22a30/brady_handimark_portable_label_maker_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b10c25ce-bc41-45f1-b72b-30345de8d3e7/first_alert_model_sc9120b_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c56dee78-ffd8-4300-b8a4-d1a931aa3a09/pharma_quality_assurance_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b1c0a91-279e-45d6-af35-96caade098ac/juwijunosulanixuxepefo.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/67788778025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/812573ba-1198-412d-850c-56bc847aa230/ps4_romance_of_the_three_kingdoms_14_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69a6fb03-32fd-4792-8e9a-e825f24212aa/37174553775.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/75346402976.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/graftech_international_annual_report_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c26ba92-678d-4015-b234-b611ebc7ceaa/xibugalafor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e7b5f02-d01b-4b5d-8f5d-ae7ed51cfeb0/how_to_clean_a_dyson_battery_vacuum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db65a92f-81ab-44fb-978c-4984cbca4014/hurt_feelings_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df3330c8-6801-46c3-9d28-9cc8449ec109/harry_potter_characters_starting_with_g.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4782cce3-421a-44ea-9c98-ded8c55ad5e0/tajug.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_off0000ee0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 5216 bytes
SHA-256: 7d9da12130ef2db37bba14777369e6edc15159311c218331c3da507aed19033f
font_01_sfnt_off0000ffd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD0 10052 bytes
SHA-256: fc9faead747a26e22af01c0eb7bd0c43a2ee8874bdb39252951c292e560c0f9e

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