Malicious PDF — malware analysis report

Static analysis result for SHA-256 75aaafa8e14d890c…

MALICIOUS

PDF

77.0 KB Created: 2021-03-10 14:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9fd1b621b5d2e20fd4db3e2df7b8e535 SHA-1: 18fb4f19451bda2d4380abe0b6de6069ee1d50bd SHA-256: 75aaafa8e14d890cbe49363529398335cd40f15dc279a978a1cb713310d30334
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body's reference to a 'video song' is a common lure to entice users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/123?utm_term=chellame+chellam+aaruthra+video+song PDF link annotation
    • http://tewatag.medianewsonline.com/zemavomas.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/ijgiOij/dynamix_music_promotional_code.pdfIn PDF document text
    • http://powusonuruw.22web.org/78882595888.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/jifaidU/pokemon_full_hd_wallpaper_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/d89ifAJ/ralphs_ice_flavors.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/hgegi3d/candy_frenzy_mod_apk.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/48998349688.pdfIn PDF document text
    • http://manamuposa.getenjoyment.net/87223333848.pdfIn PDF document text
    • https://cdn.sqhk.co/muvasesuru/Ajiiiha/retro_game_sound_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/dEZOhjX/foxojafewufejunileloki.pdfIn PDF document text
    • https://cdn.sqhk.co/gutipefu/eMid9hf/facts_school_philadelphia.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/yThhNgg/nejuxu.pdfIn PDF document text
    • http://fulukegoror.getenjoyment.net/the_other_side_of_paradise_lyrics_1_hour.pdfIn PDF document text
    • http://zabopibisoxe.22web.org/energy_storage_materials.pdfIn PDF document text
    • https://cdn.sqhk.co/kukugejekibi/fRwhgIp/gijukipix.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/sisaxu/werijifexojevudixisoze.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/duzukosume.pdfIn PDF document text
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_ec9a42803f684323b3b25a0e59b5e947.pdf?index=trueIn PDF document text
    • http://fijoramobizedej.epizy.com/savory_recipes_with_puff_pastry_sheets.pdfIn PDF document text
    • http://dusetelonuzaj.epizy.com/panasonic_answering_machine_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/chicken_invaders_2_free_full_version.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_34c009343083455e939e308aabaa2ede.pdf?index=trueIn PDF document text
    • https://b3df6b87-ca8d-4c26-b815-8c697753997b.filesusr.com/ugd/896a32_972d92dc89af42238292aeb15a8b8d8d.pdf?index=trueIn 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_off0000edd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD8 5316 bytes
SHA-256: 1cf0e56584602c2ea6f1b4f4efc0dd1e0d9aa2a99a6260cf57165cce23cfba5a
font_01_sfnt_off0000ffc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC4 11408 bytes
SHA-256: 536c999d63dbb616f610b1a40951e3c43617223b746a4f4f1540a475265133c6

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