Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e5c939dd8c60e75…

MALICIOUS

PDF

79.6 KB Created: 2021-04-06 13:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8adc32eba307bd23c461c5f7cf70250d SHA-1: c47b12e20387d7d2b667e153eed2adf7a05a3a62 SHA-256: 5e5c939dd8c60e75c391529e736818868ccc146f8c298769c9343186040f3108
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, with a primary redirector identified as https://seumenha.ru/strik?utm_term=how+to+critically+analysis+a+poem. The document body, though heavily obfuscated, suggests a lure related to poem analysis, likely a pretext for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/strik?utm_term=how+to+critically+analysis+a+poem PDF link annotation
    • https://cdn.sqhk.co/leporolino/ggjbhac/kotoputa.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/jif5gfi/repost_soundcloud_to_instagram.pdfIn PDF document text
    • https://pelabomorifij.weebly.com/uploads/1/3/4/6/134628360/nojebumoxisonop-denam-kitodi-bezelunobefuma.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/SFr2ujf/1006880461.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/V1ihMPi/81431341714.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/juwed_vinokepamikez.pdfIn PDF document text
    • https://cdn.sqhk.co/letonolomo/dgfheLg/idle_tower_defense_hacked.pdfIn PDF document text
    • https://kujegafibez.weebly.com/uploads/1/3/4/2/134265926/230a9e1f81bc9ad.pdfIn PDF document text
    • https://rarejiwu.weebly.com/uploads/1/3/1/6/131606055/dugojukidodesasate.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/mubefula/freemarker_template_vs_thymeleaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fee714fe-b5b3-4015-bc97-54fc4be10875/mims_drug_handbook_2020_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/16666636100.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/partitional_clustering_algorithms.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/17586008357.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/duruvinimopedoxariv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee0095d-d170-4786-87ae-f3a8bec61083/farataniki.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/gupeximavavipig.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/dnd_5e_restore_limbs.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/xupekeduzasug.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/going_up_the_country_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/barron_s_gre_psychology_7th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/air_conditioning_maintenance_contract.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/aetctbo_rauf_faik_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/41735689464.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/6926836633.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_off0000faac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAC 5232 bytes
SHA-256: bbaa984339be1d04fb2a52ec32b316ca34040bbcc2e5abcf7998855aab1a6b35
font_01_sfnt_off00010c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7D 10572 bytes
SHA-256: 3ea75999f84ad4eddafa1aacbd5b9dc2d5f9b81e88c210ed85b823229cb0915e