Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd09b29824d2356…

MALICIOUS

PDF

76.9 KB Created: 2021-02-27 03:27:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ab096204fe705aa735c385be89f48497 SHA-1: a26496d7441a07e0c6227bac806e3d8271463982 SHA-256: cdd09b29824d235644665a511f449918be13456275ea4b01b7dcc7d85ac6ffa3
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site or download a payload. The document body, though heavily obfuscated, suggests a lure related to an 'Amazon fire 10 user manual', which is a common tactic for phishing or malware distribution.

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://xezojetit.ru/strik?utm_term=amazon+fire+10+user+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450038/normal_60297d27937e8.pdfIn PDF document text
    • http://rastet-malysh.ru/how_do_you_say_thank_you_for_your_time_in_an_email0ufmd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475729/normal_5fe3a580b0c04.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/46300527468.pdfIn PDF document text
    • http://uscreditinquiry.info/tolosalasuzerigrzp5h.pdfIn PDF document text
    • http://xrootunited.com/electron_configuration_and_orbitals_pogil_answersnjw9k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_5fd0a48834d80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462345/normal_602b75f1cec01.pdfIn PDF document text
    • http://prosale.company/voraxexaxulawefuwamokcb91r.pdfIn PDF document text
    • http://reduslim-officialsite.site/2233430095330e3y.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/zonivezada/pagegobe.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/play_store_app_for_android_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/magnetism_5th_grade_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/2020_bulkers_annual_report.pdfIn PDF document text
    • http://pifutujotot.epizy.com/improving_self_esteem_and_confidence.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_off0000eeac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAC 5420 bytes
SHA-256: 7c4515c0c53a8f88ba6762ca19614f104b6c909ff8059fb129a7296c57b9107b
font_01_sfnt_off0001010c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010C 11032 bytes
SHA-256: 26b662cfa52f4c3721ca1548faca5f66962bf08567e2436338a03b7205f4c8d4