Malicious PDF — malware analysis report

Static analysis result for SHA-256 6251a3dcd9d6d404…

MALICIOUS

PDF

83.1 KB Created: 2021-04-08 17:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ed618995ff1e6e4b8c3fea5db57d63f2 SHA-1: 85c5caafd7e21790263a6a4dd6b427979eea062f SHA-256: 6251a3dcd9d6d404b48bd5a644f87df06240d57d4bb58e12cc2892dcfa7b17b6
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains embedded URLs that lead to suspicious domains, suggesting an attempt to redirect users to malicious content. The presence of 'cmd.pdf' and related URLs in the document text indicates a potential attempt to execute commands or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://dafemum.ru/strik?utm_term=is+tessa+pregnant+in+after PDF link annotation
    • http://sesesuruko.mypressonline.com/jamojuj.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/how_to_run_python_code_using_cmd.pdfIn PDF document text
    • http://kawlites.online/cambridge_preparation_for_the_toefl_test_book__cd-romxzic3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489414/normal_5ff75dd357438.pdfIn macro / runtime command snippet
    • http://natural-shop.info/world_conqueror_3_campaign_guideig73x.pdfIn PDF document text
    • http://firstdoctor.xyz/god_of_war_chinese_apk_gameo9zac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479938/normal_5fdc650b7cde7.pdfIn PDF document text
    • http://kinoxca.xyz/can_anyone_earn_money_from_tiktokoojes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_602aac1e78b19.pdfIn PDF document text
    • http://sexedate69.site/94994374602kpyd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492259/normal_5ffaa58bd07d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451377/normal_604bbccfb3b99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501233/normal_6045036cc2e7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415770/normal_5fccc5606217c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465259/normal_6026670d15144.pdfIn PDF document text
    • http://buzevuzelape.mywebcommunity.org/2476503372.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470408/normal_5fef6994bd1cf.pdfIn PDF document text
    • http://kawlites.online/cambridge_preparation_for_theIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/guxikej.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/what_is_another_synonym_for_touchy-feely.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/jubivefuzojap.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/lds_primary_2020_newsletter.pdfIn PDF document text
    • http://pozajuw.atwebpages.com/zilulow.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/dezasulibexalukezoda.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/sekuvejawuki.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/dizunulejelenugoge.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/how_to_clean_a_delonghi_portable_air_conditioner.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_off0001082d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082D 4976 bytes
SHA-256: 0dc6749ed80072dd9b43414265b0d634ce81086d5b0435070dd5e4efd797aaa2
font_01_sfnt_off00011930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11930 10588 bytes
SHA-256: 03187ebe467dc552780958071f7723bb52185810c27862d9b2c476e163a54d04

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