Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca461506dc8e9268…

MALICIOUS

PDF

74.5 KB Created: 2021-03-05 17:29:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 003057a8718fbb7eaf071352ba1ec777 SHA-1: 413fded420ab1709407b9ba529e98a51d3874f42 SHA-256: ca461506dc8e926803ef451b9c00efe1fd3593e6a683910dc89ecbea1feaebed
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'golowaki.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=benzoin+condensation+thiamine PDF link annotation
    • https://cdn.sqhk.co/somisafeg/ermhh6d/pico_question_examples_nursing.pdfIn PDF document text
    • https://cdn.sqhk.co/pabefidinaz/lVWnjhr/26874498942.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/h0ogchj/subway_surfers_hack_android_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/iqnpiea/rakifipenipelirurariv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_602a501497b33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451035/normal_5fdc69d837006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393908/normal_5fd2cdcd83f94.pdfIn PDF document text
    • https://cdn.sqhk.co/bexuxoxabim/hejjSD9/36675461331.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/5TjdijL/69605197309.pdfIn PDF document text
    • https://cdn.sqhk.co/wotirixa/u5hhKjb/switzerland_covid_restrictions_travel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_5fd9faa77543e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479707/normal_60041128888a8.pdfIn PDF document text
    • https://cdn.sqhk.co/midipumep/jiJgzjg/41727867979.pdfIn PDF document text
    • http://segikusi.22web.org/71246668325.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://uploads.strikinglycdn.com/files/01314174-4949-4d85-ac58-64d315915353/babazusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd880495-2194-4e91-ad23-857b92a5d85d/business_law_today_the_essentials_text_and_summarized_cases_12th_edition.pdfIn PDF document text
    • http://lizelonuzabixek.epizy.com/22234504986.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_off0000dafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFE 4936 bytes
SHA-256: dd74cec39b5baee94c9074aa39c15cfc12ce8b6caae69354c7db6292ef8f2b46
font_01_sfnt_off0000eb9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9E 10348 bytes
SHA-256: 53675273e5db25b67b8ec9fa6d982440c90bc387a5d6b4521616c24f548baaaa
font_02_sfnt_off00010f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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