Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e9d0e3cbcc9919…

MALICIOUS

PDF

86.1 KB Created: 2021-05-15 22:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 12e6636b49746bc951d2ae28badbdd83 SHA-1: 48615ed5172c54688d548d4dc4e62e6d38ba6384 SHA-256: d3e9d0e3cbcc99196eebc5582cdd537a6d0a4419ccc1c6fdc3e1f66aa98daa92
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to car prices, likely as a lure. The presence of multiple links on disposable hosting and a link farm heuristic further indicates malicious intent, likely for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=how+much+does+a+2020+camry+cost In PDF document text
    • http://stavki.link/bulujufekidajirebc5eei.pdfIn PDF document text
    • https://cdn.sqhk.co/mojaribi/ePjapgg/15396842243.pdfIn PDF document text
    • https://cdn.sqhk.co/toxodabatot/hjmGjc7/1142294607.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/bidhaii/offroad_hill_climbing_adventure_racing_game_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/Khehech/bingo_cards_for_zoom.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/4Xjcaha/new_song_neha_kakkar_ke_2020.pdfIn PDF document text
    • http://defi-bet.world/anna_tsing_mushroom_at_the_end_of_the_world_summary3i0j5.pdfIn PDF document text
    • http://greatmasters.biz/fikimixefeluxibojexizosi96pb9.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/cellulite_traitement.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/hhiaKjd/jabumasuzopexuka.pdfIn PDF document text
    • https://cdn.sqhk.co/bufudoraxala/gfxheid/kipofizadipimelal.pdfIn PDF document text
    • http://xaredazisom.mywebcommunity.org/23458788283.pdfIn PDF document text
    • http://jakiduve.scienceontheweb.net/electrolytes_for_electrochemical_supercapacitors.pdfIn PDF document text
    • http://xajavawinereko.mywebcommunity.org/area_conversion_chart.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/kikunojulejuj/loporizuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/42132822346.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/when_worlds_collide_lyrics_spongebob.pdfIn PDF document text
    • http://vupaguriwedizid.atwebpages.com/conair_clipper_blade_adjustment.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/pamofesomipusoj.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/kali_amman_tamil_songs_free.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_off000111a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A0 5576 bytes
SHA-256: ca34f454dd3298dcc816fd0952d5632bf1779b358c1c76451dac5775ccee1cec
font_01_sfnt_off0001247b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247B 11372 bytes
SHA-256: 30ce76dd2982fef21f082dd0323b3383fb52af14bef666861482c0d7372ec9a3

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