Malicious PDF — malware analysis report

Static analysis result for SHA-256 117a83f7d60af737…

MALICIOUS

PDF

93.0 KB Created: 2021-03-06 09:31:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: db73f7cf48b9ae47a4e18e70ef4f484a SHA-1: 3d89c1e02c38f1bf0c3f35e27096e4799ed2d977 SHA-256: 117a83f7d60af737dff20ea27b85f168590d5eca167c2d46a23104eaafe070df
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or conducting phishing. The document body, though heavily obfuscated, contains metadata related to its generation, but the primary malicious activity is inferred from the numerous external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/wix?keyword=causes+of+imperialism+in+southeast+asia PDF link annotation
    • http://medicinfo.online/vetizakuguvoleg0febj.pdfIn PDF document text
    • https://cdn.sqhk.co/zufuxirap/iduhdji/54077195646.pdfIn PDF document text
    • http://zabovawupe.mypressonline.com/the_secret_dare_to_dream_soundtrack_waiting.pdfIn PDF document text
    • https://cdn.sqhk.co/xoraxuvonaf/c58id69/lukirifivemuvutoto.pdfIn PDF document text
    • http://peludofnor.fun/89519552821q6rzb.pdfIn PDF document text
    • http://getepitisux.mywebcommunity.org/in_the_heart_of_the_sea_chapter_7_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/rubupidorinu/uhcicJf/yellow_honey_aesthetic_wallpapers.pdfIn PDF document text
    • https://cdn.sqhk.co/jovojatubo/hdF9vN4/zukofimatejedegope.pdfIn PDF document text
    • http://penafur.scienceontheweb.net/2005_yamaha_v_star_1100_maintenance_schedule.pdfIn PDF document text
    • http://sdek-24.cc/78408356590n1in2.pdfIn PDF document text
    • http://zonokiwuwagupu.getenjoyment.net/59238034095.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvetux.myartsonline.com/90859372564.pdfIn PDF document text
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_db5a30bbf7dc449687df8d1f82e41a71.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/battery_tender_jr_user_manual.pdfIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_f807e8f05209495b942335c1416deb8d.pdf?index=trueIn PDF document text
    • https://e7f45dcf-1957-410e-85b1-216e85a225c4.filesusr.com/ugd/a2c2bc_2007f4847605462b868ce7d91d1d7844.pdf?index=trueIn PDF document text
    • http://sogivuwe.onlinewebshop.net/pafasexosisapoxutugalile.pdfIn PDF document text
    • http://dojafeduzig.myartsonline.com/neato_xv-21_replacement_parts.pdfIn PDF document text
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_b04d293a4f6d4b39851387a5d4208257.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/patizipitobasujupen.pdfIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_d7bbec33be214e548e2b0705f478169b.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000130ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FF 5044 bytes
SHA-256: 877d66cd2282ddd71f8fbe192e112f0bb097d221eb4282e6271d363f34b4351c
font_01_sfnt_off000141f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141F4 10656 bytes
SHA-256: be1cb8540402967b633bec6db95121e3d1abdc74e4bec8a9e1b3c478ecf9250e

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