Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97123784f9fd959…

MALICIOUS

PDF

72.6 KB Created: 2021-04-02 13:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9d884088cd9412a125bf7e624e88bb64 SHA-1: 7912fc26aae9bd2e5990bc756614489a8fa9ba72 SHA-256: c97123784f9fd959b65781bc4934fd2e8d1e9333e434e8154e16ebb928f01284
96 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://seumenha.ru/strik?utm_term=kohler+steam+generator+service+manual', suggesting a phishing or malware distribution attempt disguised as a service manual. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a likely attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=kohler+steam+generator+service+manual PDF link annotation
    • http://rivilidopu.medianewsonline.com/assassin_s_creed_origins_guide.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/xabogunebofizatepibifalad.pdfIn PDF document text
    • http://kunutudusoxa.mywebcommunity.org/edit_text_on_iphone_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/gfjghiA/wimufanopekoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/i6hgjef/najiwobobavudugibavin.pdfIn PDF document text
    • http://tawaguf.scienceontheweb.net/kuvozumogewinafanezigekeg.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/rikolesafuwofar/9427643509.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/34235477570.pdfIn PDF document text
    • http://lusajafimaneru.myartsonline.com/vangiles_apocryphes_gratuit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96844d42-8b39-42b0-a707-b9e261f81d61/58348329678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f203969-b319-44b2-b17f-d109e664f042/neopost_in-300_psd_locked.pdfIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/arabian_nights_hookah_flavour.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/osmania_hospital_post_mortem_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/synonyms_and_antonyms_with_bangla_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc5d3ec-2c13-4d43-9066-a9c4f05d96d4/63960980529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92d6d7ad-e2dd-45da-a307-6910556a057f/safety_instructions_for_visitors.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/5438921834.pdfIn PDF document text
    • http://faleferesevo.onlinewebshop.net/mcdonalds_franchise_operations_manual.pdfIn PDF document text
    • http://samesesodore.onlinewebshop.net/robert_sedgewick_algorithms_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c65dd284-2a95-4c46-a928-42a465e91099/dunkin_donuts_plain_bagel_vegan.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_off0000de2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2A 5240 bytes
SHA-256: 10f99f5a7fb2e9ecf7fb29aa850ab23b0ff9afe3efc4de71a7d2835b2ccb4eba
font_01_sfnt_off0000efe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE7 11592 bytes
SHA-256: 6e0e2a3ea9680bc9d9210a445ca9686642ad50d2b9c84c146241911de6cfaab0

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