Malicious PDF — malware analysis report

Static analysis result for SHA-256 729488aabcbb9972…

MALICIOUS

PDF

80.7 KB Created: 2021-03-30 20:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f580d8958c1258e61e00caeb78910a78 SHA-1: 74394bb28637d265c16bee26c76a2e2504387578 SHA-256: 729488aabcbb9972d2e37827d4a10a10ca4620b4db1012a2c9ecec92e40c163d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain, indicating a potential phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common tactic to redirect users to malicious sites.

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 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.
  • 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=treaty+of+wuchale+primary+source PDF link annotation
    • http://card2card.live/nubetiboremunenotojebug8ywus.pdfIn PDF document text
    • http://genusadnlo.space/standard_en55024_downloadi8s8a.pdfIn PDF document text
    • http://icily.xyz/lasko_ultra_ceramic_tower_heater_review5iuqi.pdfIn PDF document text
    • http://micrometerdigital.xyz/mrityunjay_marathi_kadambaribkcwm.pdfIn PDF document text
    • http://zahlungsservice-ch.site/virgo_the_art_of_living_well_and_finding_happiness_according_to_your_star_signe2i87.pdfIn PDF document text
    • http://stavki-na-sport.site/trx_vs_resistance_bandsdtzhs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_39395982926f46fe95e28ff780d34155.pdf?index=trueIn PDF document text
    • https://b615eccc-4413-4b1d-8109-ede925130a83.filesusr.com/ugd/0994f9_536f694ce9c2407f9546e929225a8e1f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/what_is_galarian_pokemon.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/badigazapadonidutifozifo.pdfIn PDF document text
    • https://e6e31949-ba74-43ae-8e0c-2243355e89fd.filesusr.com/ugd/69e259_64e52b86d6924d14b25c120ba9b9130f.pdf?index=trueIn PDF document text
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_19c4b4ac1ae147f89a625c8a7932f293.pdf?index=trueIn PDF document text
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_4839f110016e4d0aa6a61d0f0e21132c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/mbstu_admission_result_2017-_18.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/36366400661.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/betileragitudelofesudi.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/explain_process_control_block_in_operating_system.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/lolifikexu.pdfIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_2c84279baa6340ef92c6fbe630707435.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/honda_power_steering_fluid_change_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/jurebalebikureviraviwago.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_off0000fd11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD11 5396 bytes
SHA-256: cf14cd53043c224615f3d5a328a1e2d9506575a4e44811d602cc43e15d0b03e2
font_01_sfnt_off00010f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5B 11296 bytes
SHA-256: fd7e60818be6f4abab04e516987cdb1dd2925bf9454a7efa2dbb15095de593dd

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