Malicious PDF — malware analysis report

Static analysis result for SHA-256 058ec6029eaabfac…

MALICIOUS

PDF

81.7 KB Created: 2021-02-09 21:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5e9a05c60c41145e51e694705ddcab09 SHA-1: a1148b0963cad022429c6cd9e21cbcd0b9acd989 SHA-256: 058ec6029eaabfac8d218bdb954682e0766c77acd37afe77c73675b52ab3c87b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to reference a 'weather report' to disguise its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/aws?utm_term=manning+park+weather+snow+report PDF link annotation
    • http://zemegazi.22web.org/58150552739.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/jiNEhhI/noribigu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377401/normal_6005b231b2381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5fd898b3c35d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495843/normal_5fd63d013c141.pdfIn PDF document text
    • http://milanomoda-italy.website/developing_tactics_for_listening_transcriptllbfp.pdfIn PDF document text
    • http://redpandarecycling.com/amoeba_sisters_video_recap_classification_worksheet_answerst4rvw.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/jehdiik/46782790042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373526/normal_5fd3366598c0e.pdfIn PDF document text
    • https://cdn.sqhk.co/tumexifukevu/hr5N7ge/diskdigger_photo_recovery_app_download_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475389/normal_5fc682b248886.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408871/normal_5ffd9c0a0fc4d.pdfIn PDF document text
    • http://spencermcman.us/the_marvell_college_new_uniformxtf5p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458122/normal_601a062dc5ab2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jarunotaso.rf.gd/ceh_v10_certified_ethical_hacker_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/bobol_wifi_tetangga_dengan_android.pdfIn PDF document text
    • http://refitebi.epizy.com/jojo_weather_report_joestar_birthmark.pdfIn PDF document text
    • http://kagiweluxipo.epizy.com/28406153989.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/deere_company_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/bacteria_classification_according_to_bergey_s_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA2 5212 bytes
SHA-256: 47b964a55f1b06905a333bd61d3b43f34857104a1503b5cd1ddf8ba5fa48e15b
font_01_sfnt_off0000fe7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7B 10828 bytes
SHA-256: b487b635d73ffa2bcd3a3d7feb9c4ba54f6520f10969f4acb2da03a9e075149a
font_02_sfnt_off00012399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12399 16260 bytes
SHA-256: 1b3a7c1b7bc451495b69e6c2dc925dfa634ebf3cd17a1c22ac82dde46aeedc8f

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