Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c02e6af9eb9d9f…

MALICIOUS

PDF

75.3 KB Created: 2021-03-19 13:20:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ed7510657e5868fb036a589b5660eec8 SHA-1: 5250291ca0561a18d235a62270462b2e5810f87b SHA-256: 72c02e6af9eb9d9f7cf944432375b53c0eaf1b0a4daee8d576bef69d7b0570d2
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains keywords related to 'betty crocker recipe book pdf', suggesting a social engineering lure. The presence of numerous external URIs, including one hosted on disposable infrastructure, points towards a phishing or malware distribution scheme. The primary malicious URL identified is https://xezojetit.ru/award?keyword=betty+crocker+recipe+book+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=betty+crocker+recipe+book+pdf PDF link annotation
    • http://fajavipax.22web.org/milofuzedikobozopuzov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_6017164a74650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388619/normal_604004c30523f.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/1xLO46M/bird_rescue_nj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443574/normal_603f6c71b990a.pdfIn PDF document text
    • http://maluxevuno.22web.org/samsung_q70_refresh_rate.pdfIn PDF document text
    • https://cdn.sqhk.co/vinikawikuve/ghahcjn/pafiwuvenatetowojomaxepi.pdfIn PDF document text
    • http://mepotir.iblogger.org/latest_ielts_reading_test_2020.pdfIn PDF document text
    • http://gegejobusi.22web.org/topusajinadelow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sebukojuteropib.rf.gd/autocad_2018_for_mac_tutorial_for_beginners.pdfIn PDF document text
    • http://nonozud.rf.gd/57548174143.pdfIn PDF document text
    • http://fipiwafupogo.epizy.com/color_by_number_worksheets_for_kindergarten_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/documentation_and_reporting_in_nursing_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/beauty_and_the_beast_musical_script.pdfIn PDF document text
    • http://fukokikedusej.epizy.com/wapetolodanewowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a9f94c9-9af2-4ec4-be39-627bd2a1a3e6/microsoft_project_2013_free_download_64_bit_for_windows_10.pdfIn PDF document text
    • http://kixixiwibatogit.epizy.com/counter_strike_apk_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29af58a7-dd50-4bd4-85e4-066786582be0/questions_about_political_philosophy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef53e56a-31cf-4717-b0f6-b51a06baf619/3744983117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eda18fd0-d71d-4d5d-a935-9c02459815d7/xupikigosi.pdfIn PDF document text
    • http://refowinevog.rf.gd/livekelumadowolunotugapem.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_off0000e8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B4 5084 bytes
SHA-256: 267ee31c7b4990956d75c24a3b19014a2d2d80487a91315c5908241f05ba496a
font_01_sfnt_off0000fa1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1B 11136 bytes
SHA-256: f1d30166507b3fce163f60067abf4c95e5e0174a4d05bf09e1ee04ba98472b8d

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