Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab9e614864e09e0…

MALICIOUS

PDF

75.1 KB Created: 2021-05-08 21:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 10b3efc9ea8e7b6d99fd0c00eca29a9e SHA-1: b096a394d9d6182d3ba39fcf0110ddc9c2a30791 SHA-256: eab9e614864e09e0bbc58639f8ef88d7e499abd04e0ffaa5ca7d4f3b1d6e42be
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or redirection scheme. The embedded content, though heavily obfuscated, appears to be part of this lure, aiming to direct users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://zajinet.ru/strik?utm_term=what+is+my+race+if+i%2527m+white+american PDF link annotation
    • http://demask.space/suzifevubaseedc4s.pdfIn PDF document text
    • http://tikovg.xyz/fovulukixha2aj.pdfIn PDF document text
    • https://cdn.sqhk.co/jumuxabag/Phjhagf/42264352686.pdfIn PDF document text
    • http://gnfcns.info/what_is_software_version_controlny0hc.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/jd7WhcM/kakixu.pdfIn PDF document text
    • http://wdd13.ru/how_many_calories_in_a_piece_of_long_john_silvers_fishzw41f.pdfIn PDF document text
    • http://saleproducts.pro/69241497962rjr96.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/gi5zsha/boku_boku_hile_apk.pdfIn PDF document text
    • http://znasila.ru/403972528691auq2.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/ghjj7je/26647214807.pdfIn PDF document text
    • http://livecopyrightverification.com/zipikobosurirogaxivtdgot.pdfIn PDF document text
    • https://cdn.sqhk.co/zonigita/QKIjcmU/62088584672.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/jgNmAZ5/dota_2_windranger_arcana_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/guvelebul/YEjiohj/hideaway_pizza_broken_arrow_number.pdfIn PDF document text
    • https://cdn.sqhk.co/gujipiror/ifUjfhd/ludo_star_2_online_crazy_games.pdfIn PDF document text
    • http://allieshouseofhope.com/woxasugudexotujogedeje81250.pdfIn PDF document text
    • https://cdn.sqhk.co/dasewugiru/UFjPicn/51743276628.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/44193600839uxo7x.pdfIn PDF document text
    • https://cdn.sqhk.co/sesumaku/hahhOgf/jump_switch_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/tovitaxani/cFYjgKp/police_chase_miami_today_live.pdfIn PDF document text
    • http://verifedform.com/linogonifczd9q.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://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_663169c517b841a9abbc28c194cdd1c8.pdf?index=trueIn PDF document text
    • https://d429d46a-6203-486b-8c9d-ede5597e1383.filesusr.com/ugd/419b00_6e8c9169557942cf996caff0e86f7f91.pdf?index=trueIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_e21b3fa5e20e42e7b23aa6ae248519a1.pdf?index=trueIn PDF document text
    • https://7322f44d-5cb7-45f5-8521-a79093f6ce74.filesusr.com/ugd/dd0890_6d3c30539f374fa28e2f16522db6155a.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66D 5008 bytes
SHA-256: 262b83f3385577a3ba6e2ab8a7d57b3882a17a120ea2b5b980db129b0382076e
font_01_sfnt_off0000d75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75D 9968 bytes
SHA-256: efdd526efc4ee9c042e73042bf6249307789f0cdc10ff8d8349ca358d158a1df
font_02_sfnt_off0000f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 16080 bytes
SHA-256: 682b98d0697bd8628c40f5b2c6a4ead5ef93030e01f9f6be6c9ec1be1f6504e5
font_03_sfnt_off00010e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E56 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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