Malicious PDF — malware analysis report

Static analysis result for SHA-256 3698683c3bd572dd…

MALICIOUS

PDF

78.7 KB Created: 2021-04-06 17:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d52b635593072ba4ac1fcac558d998fa SHA-1: b807cce155274e56edd0d64dbf7c17baf620ad81 SHA-256: 3698683c3bd572dd92e21271e07413fb69234db26d1b64fbfc6b997098506c1e
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains multiple embedded URLs pointing to suspicious domains, including one that appears to be a link farm designed for SEO manipulation. The document body, though heavily obfuscated, suggests a lure related to 'Woman in the window movie release date usa', indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://pelibifir.ru/strik?utm_term=woman+in+the+window+movie+release+date+usa
    • http://lassituda.online/baworewejalekufukuwygqd.pdf
    • http://yogist.fun/69571530682nsuib.pdf
    • https://cdn.sqhk.co/reparepoki/h6ggigs/2543518812.pdf
    • http://ruvujagefeko.mygamesonline.org/fusawuvobizit.pdf
    • http://repair-telefonov.ru/fubuseduwakitamusokpa4bt.pdf
    • https://cdn.sqhk.co/terisuzuji/jfAv4gc/light_pink_room_decor_target.pdf
    • http://vugekowuzujed.scienceontheweb.net/sql_server_2020_machine_learning_services_with_r_download.pdf
    • http://m-ryanaf.site/wewedunutuup3fo.pdf
    • http://kozidozilujivox.getenjoyment.net/bangla_golper_boi_file.pdf
    • http://varietystore.website/bcbs_of_az_appeal_form0aooc.pdf
    • http://creamwalls.online/echo_srm-230_carburetor_parts7o4nu.pdf
    • http://thecaffeinatedstudent.com/fivunovurenov9c5yd.pdf
    • http://nanamojuvimujo.medianewsonline.com/94276082231.pdf
    • http://storeyou.store/honda_gcv190_pressure_washer_3000_psi_water_pumpssd5e.pdf
    • https://cdn.sqhk.co/vukupamita/HhaSj2q/podewatukavuj.pdf
    • http://goodik.fun/greek_to_english_bible_translation8asev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_b6bd628b27504860a9727f9c2a461eb5.pdf?index=true
    • https://2571d5ef-7130-409a-b87d-c3fd18a83f30.filesusr.com/ugd/71fc55_010b15c5ed03440a93cff048745db926.pdf?index=true
    • https://4c80ca50-31de-4e6f-b265-471620011c4a.filesusr.com/ugd/08c6b7_90792e666fad424db91b28782b0329f4.pdf?index=true
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_21c829a36e2e490c976c7f2c9c05162e.pdf?index=true
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_c9e4c7206ccb497eb748725459648576.pdf?index=true
    • https://b0837e58-6fb0-4b2c-a83d-c451c4d85cc2.filesusr.com/ugd/1169b1_b2a85144883c4544bfb25035a859c1c1.pdf?index=true
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_8f16f3400a94422896d1dc96a522830b.pdf?index=true
    • https://54570836-76ea-4100-b78f-d1ba4c3cc0d1.filesusr.com/ugd/21ac59_d90c5d9cebcf48c2b2db7752fc367925.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4a7.bin
83a5b74cd003af6bd10e22793059b24b21021acd6e1e02f2569bbbb937295002		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A7 5228 bytes
font_01_sfnt_off00010656.bin
01fada96bcdebcd2e879ce0ace051c35485efe38be5cf71c4b003ec69df1c722		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10656 11196 bytes

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