Malicious PDF — malware analysis report

Static analysis result for SHA-256 35fd66de94480635…

MALICIOUS

PDF

79.9 KB Created: 2021-03-13 15:22:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a8bcf7040ff64366e62ca459369194f2 SHA-1: 26cd8323bead26884a38d14bb9e6a447a030f9b5 SHA-256: 35fd66de94480635cc7ff88bd25433bd26595f7be3363f544d2e9bdd9c22d050
156 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, indicating a phishing or trojan threat. It contains numerous external links, including one to 'bologen.ru', suggesting a link farm or redirection to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a search query, likely intended to trick users into clicking on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=what+is+the+greek+word+for+intercession PDF link annotation
    • https://nibafokabatawal.weebly.com/uploads/1/3/0/9/130970001/d7a9e9fdc84b14.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/eOc9ijF/zig_zag_road_sign_information.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/xsjiu0h/tiny_planets_song_lyrics.pdfIn PDF document text
    • http://itasummer.fun/nalerasumigovefulevi62klx.pdfIn PDF document text
    • https://xuxukiworizep.weebly.com/uploads/1/3/4/7/134723333/koguletawiru.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/gh7hche/4442638841.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/regozujik_tetob_viwive.pdfIn PDF document text
    • https://cdn.sqhk.co/nedovipirumu/hgDjbwh/dark_corridors_2_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/ranofakon/hfz5ifl/cambridge_checkpoint_mathematics_coursebook_7_answers.pdfIn PDF document text
    • http://rmk4sale.xyz/malware_virus_removal_guide4c45k.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/dakebesuvum/vikatoxikolulefelavavad.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/60993516901.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/foodsaver_v2490_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68e66538-b8ba-4ee4-bdbf-5ecfb143698c/36642100566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcccb272-042d-4193-a0b8-fc15e06726d3/how_do_i_reset_my_heil_furnace.pdfIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_e2a80cd4ab574454a2b3d56c740942e5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sitok/how_do_you_use_the_hoover_turbo_scrub_spinscrub_50.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/why_does_my_motion_light_keep_blinking.pdfIn PDF document text
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_2a65e9931e01410d9807b33089280ff5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b52fed-d715-4806-b7ee-52faaff9d915/98005393970.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_off0000f0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F8 5420 bytes
SHA-256: b76e40868fd87ffdd9c09804a3dcf731723cdff261b94f932eb4627f2afcb18a
font_01_sfnt_off00010380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10380 14228 bytes
SHA-256: 3db7b609a348f06b3b05cc3e9ee1c73b62957b02b2e1ed26aa7d42f89441fb71

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