Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b9ff73ff9433a7…

MALICIOUS

PDF

83.5 KB Created: 2021-03-16 03:21:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: bf2215aaabc1e31ddae82ede5de72909 SHA-1: 5e59e13f06501ed9aa06c25443f7e6dc4bf02a03 SHA-256: d8b9ff73ff9433a7a5496593f64bbccb3c426edcd668a6469f60e0522cc2be8b
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are designed to mimic search engine results for software or documents, indicating a link farm or SEO poisoning tactic. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document's primary purpose is to trick the user into downloading a password-protected archive, likely to bypass security scanning. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://lozipotod.ru/award?keyword=biochemical+test+bacteria+pdf PDF link annotation
    • http://pewadulojuba.mypressonline.com/30612841281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424682/normal_6033eda9deac0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388412/normal_5fc78bdeeed31.pdfIn PDF document text
    • http://votixibutiro.medianewsonline.com/ms_word_and_ms_excel_shortcut_keys_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469634/normal_60269db63b0b9.pdfIn PDF document text
    • https://leduzurukidep.weebly.com/uploads/1/3/4/8/134858842/mojafutoter.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/a9iahiN/idle_legend_3d_auto_battle_rpg_code.pdfIn PDF document text
    • https://cdn.sqhk.co/karapenakozi/cggHPjb/aadhaar_card_by_aadhar_number.pdfIn PDF document text
    • https://fijogukovope.weebly.com/uploads/1/3/1/3/131379832/jomepubejiwanun-nefav.pdfIn PDF document text
    • https://cdn.sqhk.co/xawuboma/ibaXdhc/41202389997.pdfIn PDF document text
    • http://zesegalos.scienceontheweb.net/6852156011.pdfIn PDF document text
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/ba92fad2d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470689/normal_5fffa29c98ab4.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/iijOhgM/om_nom_nom_trophy_ps4_minecraft.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/najipavez/pc_administrator_password_recovery_software_free.pdfIn PDF document text
    • http://lipabarud.atwebpages.com/38476091687.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/zunorofalefu.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/schwinn_airdyne_evolution_comp_parts_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/vuxazobafa.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/58169910309.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/ajax_submit_form_data_serialize.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/news_discussion_platform.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_off0001096c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096C 5584 bytes
SHA-256: d772facd52ab53a68661a9ba2bd4bd1759da74a309c7f19e26378e7d70d3c7ec
font_01_sfnt_off00011c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C33 10804 bytes
SHA-256: 96fd5e5b7bcbefad113400f0f2763fe80e6ea3d721617b0a44ecf89325961afd

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