Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc7d47c8c8e3be2…

MALICIOUS

PDF

99.9 KB Created: 2021-03-23 10:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b16e78d598683f23e868e853c9352b0d SHA-1: 9860f9c2c945d80c6f1d269da35516af97839860 SHA-256: 7bc7d47c8c8e3be296484228b34e265ad46536ccf2899f1a24e049578e7d99cc
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 0.9965

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://ponafet.ru/award?keyword=golden+rules+of+accounting+in+gujarati+pdf PDF link annotation
    • https://cdn.sqhk.co/noperizapewo/eejbITk/losivug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404108/normal_6013155d69c42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386852/normal_60568b3d3ec9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393208/normal_601fc7e90fe49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469860/normal_604fd0dd3e559.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381081/normal_5fd96190398b2.pdfIn PDF document text
    • http://zuvels.xyz/is_the_stock_market_closed_on_christmas_eve_2020wct33.pdfIn PDF document text
    • http://getcreditreport.info/3788108946228wam.pdfIn PDF document text
    • https://cdn.sqhk.co/desiketomasu/QVljbgg/tedojisuwajaketer.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/ePjehfT/reversible_reaction_definition.pdfIn PDF document text
    • http://tersq.space/how_to_change_font_in_nuance_power_advancedimad7.pdfIn PDF document text
    • http://levantegroup.net/13788106616h9wjc.pdfIn PDF document text
    • http://copyrightreports.com/201666327076ubib.pdfIn PDF document text
    • http://bonus332.site/checkpoint_interview_questions_imeditaqghod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/77431074363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5038a47a-2ec4-4f58-92bd-dae46fcb6402/definicin_de_estudio_de_mercado_segn_autores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d86624-b717-4294-82e8-e18141c40515/an_introduction_to_language_9th_edition_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/cuantas_calorias_tiene_una_cucharada_pequea_de_miel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd7e86a9-ee71-4d17-854e-f9517f2f3093/multiplication_times_table_chart_1-12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c60b4a-772a-4c21-9145-8965e9e8e7f9/how_to_wire_a_furnace_limit_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/business_report_baton_rouge_election.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/oxford_dictionary_of_collocations_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/569aa1fa-b0aa-4f2a-af40-dbc2562a6239/nizeponemuxawomir.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5E 5432 bytes
SHA-256: 938c4e1ccf5f525d346ecd5aa2d6555874ea9588a0f709959cefbb53ae601091
font_01_sfnt_off000111ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111ED 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off00011d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4F 8112 bytes
SHA-256: 5e426955e6eba9dc48918575e27b2b73be2f755b762a391c09b432fa4d8f09e9
font_03_sfnt_off00013723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13723 10880 bytes
SHA-256: e7672a8e8ec23ea5f6d97df07d6b20245e3511f355517967051f72fee6636e47
font_04_sfnt_off00015c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C35 10400 bytes
SHA-256: ffc654b1ee51ac10d405074414c226b23164696e1b16d96795fd48d15bc6fd67

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