Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0816ceb69eb999…

MALICIOUS

PDF

67.9 KB Created: 2021-03-18 11:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: fc27bb23e7015d8f8516fcb0171ef153 SHA-1: 5adcdea6f899efef8e9677e0801ed7fd7e5c81bc SHA-256: 8e0816ceb69eb999cdefb2c7e8b9af571b3c8348550a3cee93722426e0c4248e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/123?utm_term=activity+sheet+final+letter PDF link annotation
    • https://guzuwifaxad.weebly.com/uploads/1/3/4/0/134096987/5949e57.pdfIn PDF document text
    • https://zubikuzo.weebly.com/uploads/1/3/1/4/131453486/1650701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443595/normal_604cbacd5507e.pdfIn PDF document text
    • http://crawlmqyu.space/49113227980w8l10.pdfIn PDF document text
    • http://mx50off.pro/flow_3d_v11_free_downloadvgzbk.pdfIn PDF document text
    • http://harmony-market.ru/fotarugop7dkza.pdfIn PDF document text
    • http://bojidodug.iblogger.org/robotic_process_automation_pwc.pdfIn PDF document text
    • http://kukushka.space/blank_climate_graph_worksheetsmjc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413005/normal_603b6523f176b.pdfIn PDF document text
    • http://parkingtest.xyz/83395515895cgsl0.pdfIn PDF document text
    • https://poxawakepuk.weebly.com/uploads/1/3/1/6/131606289/dexuzapaxu_xadudu_mavafafevob_nulek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473056/normal_6009b6a0cd496.pdfIn PDF document text
    • http://dwatches.site/30075042795y3kqo.pdfIn PDF document text
    • http://scoretdho.best/42450904243xjc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468261/normal_5fe9eb0c44c12.pdfIn PDF document text
    • http://podcard2020.site/jikoxolalib9ggm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jagazasa.epizy.com/66106086009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8977242f-8670-4a71-aaf8-8d1743124e3b/what_to_do_when_your_hp_laptop_says_preparing_automatic_repair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d0739f-c9ed-4a5a-88bf-28fa1bb35da0/the_rockpile_by_james_baldwin_characters.pdfIn PDF document text
    • http://zavizalovop.epizy.com/printable_weekly_planner_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1504b53-ebeb-4d31-aa86-adfeb176c136/dijewat.pdfIn PDF document text
    • http://gigogapa.epizy.com/jitas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ea1a621-d571-40dd-9516-a822bdb97b0f/dirojatupomozavuripobenig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0becf4b-d98b-47d1-82d8-d67a7176c1e8/how_to_get_bill_of_sale_form_dmv.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_off0000cf32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF32 5120 bytes
SHA-256: 9d7defeb6c645d9da09171482caad391ceb9ca9d71b09360b1ae1543db8494cd
font_01_sfnt_off0000e0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AA 9672 bytes
SHA-256: 843d7db0752b3fdedb4f108d8e07bb43d300e9cb6b33fa5480a5995e33658213

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