Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46119f4634ad6bb…

MALICIOUS

PDF

79.0 KB Created: 2021-06-05 09:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0943d5d724b42c0025ef6885f6a673fa SHA-1: 02f89f1789f20ff6a857d59f2baadcbdff6d2fcb SHA-256: b46119f4634ad6bb30f8ec073710c5cf22062844a9e83c8f85f7cd7d8f46a67a
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm designed to manipulate search engine results. The primary URL, 'https://ketchas.ru/pbw?utm_term=business+statistics+made+easy+in+sas+pdf', suggests a lure to a website disguised as a PDF download. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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.
  • 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://ketchas.ru/pbw?utm_term=business+statistics+made+easy+in+sas+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489414/normal_60443016b9c58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489412/normal_6069edd2db21d.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/340e22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447431/normal_6017f99ae398d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452193/normal_5fd0996b6acd4.pdfIn PDF document text
    • https://pelirexasi.weebly.com/uploads/1/3/4/3/134352860/vokoxufebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488316/normal_6037e7b070956.pdfIn PDF document text
    • https://fowedejuman.weebly.com/uploads/1/3/4/5/134518602/wolumaxopekafire.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4387229/normal_60b5b80927162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485318/normal_601924978b23e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_6020a8d8b3220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416506/normal_601d181241517.pdfIn PDF document text
    • https://bamaxasujobuz.weebly.com/uploads/1/3/4/3/134315865/4832219.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f5483b1b-6100-43ff-a457-d543c8fd2a4e/voniranefepodepetagagiso.pdfIn PDF document text
    • http://noxiwako.pbworks.com/f/zunevidagameranisate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f6b760-7d63-4100-b0dd-5e34b9b41284/how_do_i_program_my_overhead_door_legacy_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b33bb1f-9105-4d72-b3af-2a1adb833aa4/jivagifufesinobiwebijov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be84f3c-83f8-4537-84a5-1bfb99704925/the_white_princess_season_1_episode_7_watch_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c97314a9-0c7f-459d-b68e-4f2013fde18f/how_to_cite_internet_sources_apa_without_author_and_date.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/w/file/fetch/144440730/macroeconomics_textbook_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f55be926-9593-424c-b306-e70cd4a1ef42/famodoxopaladakezidot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1b6dd24-c95b-4ecf-91b3-1e30a4cbcc28/libros_para_aprender_a_tocar_guitarra_elctrica_gratis.pdfIn PDF document text
    • http://midevodimu.pbworks.com/f/taylor_swift_google_drive_mp3.pdfIn PDF document text
    • http://sonopewobu.pbworks.com/f/difference_between_adiabatic_and_isothermal_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af634b59-2ece-49be-9bc0-ec9069f5a726/surah_mulk_with_urdu_translation_and_tafseer.pdfIn PDF document text
    • http://kirozatijawu.pbworks.com/w/file/fetch/144516597/how_to_bypass_lid_lock_on_maytag_centennial_washer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6E 5096 bytes
SHA-256: f9cc30d2234fb7f4e112338c28f0d1f8b0ecb7716c49246891550f0cdc18ed6a
font_01_sfnt_off0000fbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBA 10628 bytes
SHA-256: 852915b24f6c2ec91e5783425c76e84d624e99aefc1ab298516c51995777c1a4
font_02_sfnt_off00012001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12001 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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