Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e1fd54283cab32…

MALICIOUS

PDF

95.2 KB Created: 2021-05-01 00:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 23d9f20fe096ddb48f0da5ef20fc1212 SHA-1: b90fb43c59da00afe3e8bdd152e9f72c6e4fb440 SHA-256: 80e1fd54283cab32e87f183abbf6a3d13ec27676b6c968d9add20108e75dbb69
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 0.9997

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://jumiwimov.ru/strik?utm_term=mossberg+590a1+with+bayonet+lug PDF link annotation
    • https://cdn.sqhk.co/vulovosovem/hib7idR/mevowaguwelunoxorosuvos.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/WJTjghf/twitter_viral_videos_this_week.pdfIn PDF document text
    • https://cdn.sqhk.co/goropakuvoge/iaijgcN/57096176661.pdfIn PDF document text
    • http://kokilubowo.22web.org/xizovotav.pdfIn PDF document text
    • https://cdn.sqhk.co/fukafodifi/iGjf7ia/world_time_attack_aerodynamics.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/ijijaJr/gazijemakuxukovulabubeg.pdfIn PDF document text
    • http://bilapak.66ghz.com/box_tops_collection_sheets_20.pdfIn PDF document text
    • http://mapimiz.22web.org/calendario_escolar_castilla_y_leon_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f38823fd-3ea2-4359-8eb2-d079e62ddde1/sozagapub.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/how_a_cool_mist_humidifier_works.pdfIn PDF document text
    • http://kirezalodonuni.epizy.com/lepelusufefaziso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1dc5139-2137-421b-9b70-d84dc0cf6281/tommy_emmanuel_lewis_and_clark.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0382064a-fa43-4ae0-9f0c-147460c16422/what_is_unity_harmony_in_art.pdfIn PDF document text
    • http://gitogopafo.epizy.com/quantitative_risk_management_concepts_techniques_tools.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/jurassic_park_theme_piano_easy_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51829375-7e66-4399-bade-b7114934abfb/what_are_some_examples_of_hyperbole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/086443b5-d486-4506-a2ef-ab52908fe70e/72036884068.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/android_10_update_nokia_6._1_plus.pdfIn PDF document text
    • http://buzeliri.rf.gd/42892018437.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/wujigujuvaxujesixapeguliz.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/59725897686.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_off000133c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C7 5760 bytes
SHA-256: b01397b3116ea5e6ea9825b6d98ec5c196a5e6708ec09af6cb6f915f286bb27b
font_01_sfnt_off00014788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14788 11736 bytes
SHA-256: 7cd723aec4b8dc30611c21dba69327baf561c8f3abfb234a1e15bfee96142e0f

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