Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c3f4b167f11743…

MALICIOUS

PDF

71.4 KB Created: 2021-04-08 09:39:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 220e0efbf49f331df8179fd27c392ab2 SHA-1: dfd934091fb4cc29e58c238302aee7fe80f55f17 SHA-256: e9c3f4b167f117434b77d7f2110b4d35631e02e3ca6a0128015438ff6dceae8e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=chembiodraw+ultra+14+free In PDF document text
    • http://sudedelanefozuk.66ghz.com/65286498417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464851/normal_6014f4774a46a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476010/normal_60174adf019c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391315/normal_5fc90a87016a1.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/50395099769.pdfIn PDF document text
    • http://puduvab.sportsontheweb.net/18855486025.pdfIn PDF document text
    • http://jofosisajagov.iblogger.org/petty_cash_reimbursement_form_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454432/normal_60650b0f872d1.pdfIn PDF document text
    • http://fotogodopuxet.iblogger.org/deformers_trophy_guide.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/amoeba_sisters_characteristics_of_life_worksheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367271/normal_5fcf73e912928.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/pujirageg/sony_ht-ct260h_sound_bar.pdfIn PDF document text
    • http://monozalimixa.rf.gd/7_little_words_free_puzzle_playground_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/blood_vessels_structure_and_function.pdfIn PDF document text
    • http://pidisoxoxaxar.rf.gd/how_to_lie_with_statistics.pdf.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/kodoxotinufoku.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/1014132152.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/66113811400.pdfIn PDF document text
    • http://boxijekew.atwebpages.com/wasume.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/riberogejejukixi.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/black_skins_white_masks_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/fine_woodworking_magazine_back_issues_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/mechanics_of_materials_beer_6th_edition_solutions_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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD339 5248 bytes
SHA-256: 2a01788eabbe316d9b9056ac141ae7e421aca6a5856b74ce3c8fc605d4ce22cd
font_01_sfnt_off0000e4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4ED 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000ed7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7B 10016 bytes
SHA-256: 20f79f49ddbfca5d952e1b3cbe8e4fe4df58474369063006dded502a4bafabff

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