Malicious PDF — malware analysis report

Static analysis result for SHA-256 83bd5d11261d8f91…

MALICIOUS

PDF

77.2 KB Created: 2020-11-25 06:36:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4b9afb9f94d4cbb246f5696aaa803fc5 SHA-1: 7049d596418ec768ccc010fe5ec769e713ed8dfd SHA-256: 83bd5d11261d8f91b6d7622d0fa715d3977cb61f0059e63fc563c3f6ec82da5e
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body contains obfuscated text that includes a URL, 'https://traffset.ru/aws?utm_term=chaddobeshi+movie+song', which is likely used to redirect the user to a malicious site. The presence of embedded URLs and the overall classification strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/aws?utm_term=chaddobeshi+movie+song PDF link annotation
    • https://kinumonitebira.weebly.com/uploads/1/3/4/6/134605003/katolo-vusinidokaduk.pdfIn PDF document text
    • https://fuxugunepegox.weebly.com/uploads/1/3/4/7/134761488/dobalunujejisem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404107/normal_5f988911c8ee0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_5fb9e19db74c7.pdfIn PDF document text
    • https://bezebaterizijir.weebly.com/uploads/1/3/1/3/131384714/golelid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408983/normal_5fae35c69170f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xomudufe/english_test_with_answers_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/los_meaning_in_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85c0db93-4bac-43ef-992a-a42fa0253f95/zuvubezapetukaguv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E4 5040 bytes
SHA-256: c11277cd97dcdd7db9dd76c4f50221c2b454024adc01b164f06ca2a3a99b6e9a
font_01_sfnt_off0000f4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E5 11076 bytes
SHA-256: c9bf6eb88490dd4351d8f5edffe93d9ee9c73bf4581b0625030b850d7dfa0f4c
font_02_sfnt_off00011a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A51 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378