Malicious PDF — malware analysis report

Static analysis result for SHA-256 8048824168b3e99d…

MALICIOUS

PDF

73.7 KB Created: 2021-03-25 14:18:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f02b3a1aee42bed4384c7aad45b9dcb8 SHA-1: 1003086a4a5cff470cad3ed517a133ba04ca8377 SHA-256: 8048824168b3e99de102a7ea8c16924924da7243e17970fbaf9ebc47707669ca
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/wix?keyword=freedom+hack+apk+uptodown PDF link annotation
    • https://cdn.sqhk.co/zanivuwiduvo/gg4HOmk/tunebakavebumexoxe.pdfIn PDF document text
    • http://ygrash.website/xixitefatawedoxalenxg6h.pdfIn PDF document text
    • http://nonly.xyz/rubawqdnuy.pdfIn PDF document text
    • https://cdn.sqhk.co/zozimevoket/ifwGlic/watch_social_animals_documentary_online_free.pdfIn PDF document text
    • http://gedirobidepud.scienceontheweb.net/the_endless_summer_movie_trailer.pdfIn PDF document text
    • http://idealica-official.website/padi_open_water_diver_max_depthnpgbl.pdfIn PDF document text
    • http://xivazokib.medianewsonline.com/how_to_teach_dyslexic_adults.pdfIn PDF document text
    • http://goligofalu.medianewsonline.com/acetilcolina_farmacocinetica.pdfIn PDF document text
    • http://realnoe-obshenie.online/banjara_songs_mp3_free_downloadsfc94.pdfIn PDF document text
    • https://cdn.sqhk.co/liminekaj/b4yifkc/nidudikekewusaxajutisid.pdfIn PDF document text
    • http://ourfanz.com/50977531590gyz0q.pdfIn PDF document text
    • http://podifodosej.scienceontheweb.net/34105815190.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fb3efafe-1b0e-41a1-9434-8bf556110c4a.filesusr.com/ugd/de5e41_a96afa00ee2f4027bb92326b16dfd1a6.pdf?index=trueIn PDF document text
    • http://tiwowuda.epizy.com/34036097506.pdfIn PDF document text
    • http://kuwanuzoniwod.rf.gd/zemudakakilesu.pdfIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_251505f594f74231b1bc8170978dd021.pdf?index=trueIn PDF document text
    • http://fijorolur.myartsonline.com/metro_map_paris.pdfIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_d441d3230652418da2a9d627fb1eb6d2.pdf?index=trueIn PDF document text
    • http://fufuzadawefor.onlinewebshop.net/73561162495.pdfIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/xbox_one_wired_controller_not_working_on_windows_10.pdfIn PDF document text
    • https://1347de4c-4e54-429a-b84c-372e60bc5a2b.filesusr.com/ugd/6c98bc_c9ca2b7bbdde488fb086a51dd91bfbfb.pdf?index=trueIn PDF document text
    • http://bobiwusej.rf.gd/posavepexaxilejegub.pdfIn PDF document text
    • http://befadiw.rf.gd/how_does_an_electrolysis_apparatus_work.pdfIn PDF document text
    • http://nidolivudazos.rf.gd/cutting_practice_worksheets.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_off0000e4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B4 5212 bytes
SHA-256: 588b779b1c3f010b32e44ccd3794db06ab90dcc0ce861e72fea2f71cf968cf2b
font_01_sfnt_off0000f654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF654 10416 bytes
SHA-256: 843b14d1c0c799d73bc61a509cc1c7a62b2bc166e8e6534c6bea44c14154c7a0

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