Malicious PDF — malware analysis report

Static analysis result for SHA-256 118122696849346d…

MALICIOUS

PDF

87.1 KB Created: 2021-04-27 05:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 15dd5526081cff185cc03bdaf1f9fae9 SHA-1: 52a318f2504d0f242fec08362040a4df6e120a99 SHA-256: 118122696849346dfa64b987385f6e2bddc79d1b1e320b708c4b89f5cbede7f9
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik?utm_term=json+sample+codes+c%2523'. This indicates the document is designed to lure users to a malicious site, likely for phishing or further malware delivery. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://yafferge.ru/strik?utm_term=json+sample+codes+c%2523 In PDF document text
    • https://cdn.sqhk.co/joxusozomilo/dEielXs/escape_girl_room_level_3.pdfIn PDF document text
    • http://mezajozugabaso.getenjoyment.net/8849632132.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/3Uxhdf4/dijibasirapiketelifumini.pdfIn PDF document text
    • https://cdn.sqhk.co/sovixojer/gfHvjcZ/sputnik_movie_trailer_english.pdfIn PDF document text
    • https://cdn.sqhk.co/duwenaxiseve/cJjcibi/one_piece_treasure_cruise_discord_free_gems.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CKsihKb/40504930244.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/fIhdvmy/polish_chickens_for_sale_houston_tx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407070/normal_604fd2b703be1.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/KUje3o0/funny_driving_cartoon_pics.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/icGx4sO/72521806072.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489412/normal_5fd7d3be4aa9e.pdfIn PDF document text
    • https://cdn.sqhk.co/joremeve/hcJahiA/getamafitefuzexexesuw.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/xjcZqCd/temple_run_2_game_on_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/fifusaji/gKeorWN/siberian_cat_size_length.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/3jaSGjg/12643682802.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/Qhgif5W/ant_wars_game.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
    • http://zevusup.atwebpages.com/how_to_calculate_compound_interest_over_time_in_excel.pdfIn PDF document text
    • http://zukomakiduw.myartsonline.com/agile_software_development_life_cycle.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/do_you_italicize_book_titles_in_chicago.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/conjuntivite_bacteriana_gestante.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_off000108bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BD 4772 bytes
SHA-256: 2a92c2b8599de7ded65e75c178bfa2f3787c20fab6733e2c491c08e8b1c92d6f
font_01_sfnt_off000118d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D2 11792 bytes
SHA-256: 6a80c1c6c52b1020f13dab1ea023119a1a94b74e0eb860549345c3482d72d5c4
font_02_sfnt_off0001413a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1413A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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