Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcbeefa06d3e6a64…

MALICIOUS

PDF

80.1 KB Created: 2021-03-18 12:30:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2ab1b6638f888526fe0fb5de500a2c97 SHA-1: 1ff4592de6b7acf74d90a62f6df457ea0c653dc4 SHA-256: bcbeefa06d3e6a646f5843f5266951fce7ed2bccfd1a04c4f062415dbac709f4
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://gimoguvi.ru/strik?utm_term=how+much+does+an+emergency+physician+make PDF link annotation
    • http://vajununer.iblogger.org/pujifij.pdfIn PDF document text
    • http://kujamemapevubu.mypressonline.com/92591844894.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411937/normal_6001b7373444e.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/86730995124.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/emhcgdx/subway_crafton_shopping_center.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/FiaoJ41/american_truck_simulator_wallpaper_4k.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/mhdEbQt/hitman_2_contract_assassin_achievement_not_unlocking.pdfIn PDF document text
    • https://cdn.sqhk.co/sazoteva/hcggWGq/virufa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495390/normal_603e879589dd7.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/badminton_rules_in_gujarati.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481418/normal_603b443445258.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/nutanigonu/activador_windows_7_professional_64_bits.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/java_jre_7._80.pdfIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_b8538710743549fcb6accbeac48a83c0.pdf?index=trueIn PDF document text
    • http://zutugidod.onlinewebshop.net/dazufazuxamazituvotufegor.pdfIn PDF document text
    • http://wetupubej.epizy.com/12343074725.pdfIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_1a8f99c4f4b44dc4a7ff76d428c2bec8.pdf?index=trueIn PDF document text
    • http://mimodiko.epizy.com/learn_arabic_in_30_days_through_telugu_free_download.pdfIn PDF document text
    • http://zukeligo.rf.gd/farm_risk_assessment_template_uk.pdfIn PDF document text
    • https://d6bf9bfb-c092-4b17-ab9f-91da83e6a9d2.filesusr.com/ugd/d7ad14_e4bd757937b34c488e48a0a4ffb2f6c8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waduzirader/9951263328.pdfIn PDF document text
    • http://kozogasivufi.myartsonline.com/are_beats_lifetime_warranty.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_off0000f82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82D 5676 bytes
SHA-256: f6ae699793a640fb4ee6d19984846e0e855885794fb50fe38f44c45f5691f3e3
font_01_sfnt_off00010b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6C 10984 bytes
SHA-256: 89a5dd73553a219608dd4cb36be5f2dce1abb253ac16e88cfc0e8844fb2535fd

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