Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ea9fe4cf181643…

MALICIOUS

PDF

78.3 KB Created: 2021-03-18 11:12:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0d9c43e2ca0d9812f565355ffb28464 SHA-1: e93252d8998545a6e9da768fd951b12c84070057 SHA-256: 59ea9fe4cf18164300707d429e9998426d3a23d5f3d0683052f342cd9c7557ec
194 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 high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains, suggesting an attempt to obscure the ultimate destination or evade detection. The presence of 'utm_term=aiag+ppap+manual+download' in one of the URLs indicates a lure for a specific document, likely to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jumiwimov.ru/strik?utm_term=aiag+ppap+manual+download
    • https://vetepoxep.weebly.com/uploads/1/3/5/3/135302771/bb669943a174aa.pdf
    • http://vexoxem.scienceontheweb.net/bestiariusz_wiedmin_3_chomikuj.pdf
    • http://fibutogu.mywebcommunity.org/atlanta_late_night_spots.pdf
    • http://jaxagogilexet.sportsontheweb.net/kowagugimixizazevekutup.pdf
    • https://cdn.sqhk.co/ruwonumatag/eiehfGV/rijonotapujovomo.pdf
    • https://kunugamonigosa.weebly.com/uploads/1/3/1/8/131871761/5206785.pdf
    • https://cdn-cms.f-static.net/uploads/4477620/normal_605126e687305.pdf
    • https://tomutoremaduv.weebly.com/uploads/1/3/1/3/131398477/d0a3d79e8716d8.pdf
    • https://static.s123-cdn-static.com/uploads/4410186/normal_5fcc3b7f56e3d.pdf
    • https://cdn-cms.f-static.net/uploads/4388824/normal_601dca2a31812.pdf
    • https://cdn.sqhk.co/jobezivozuf/UTitjgB/amazon_fire_tv_stick_3rd_generation_apps.pdf
    • https://kojulijorivo.weebly.com/uploads/1/3/4/3/134329781/fozup-viwuvud-labos.pdf
    • http://raxewapikeb.mygamesonline.org/bimal_jalan_committee_recommendations.pdf
    • http://sewukagazub.mypressonline.com/breakthrough_plus_1_2nd_edition.pdf
    • http://ligexekena.mywebcommunity.org/motores_de_corriente_directa_partes.pdf
    • https://cdn.sqhk.co/kifavubivelo/Pghidhe/futaxaxageduzilidave.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://db38eef3-7d65-43a4-badd-ba39ed7d9417.filesusr.com/ugd/bd2483_274e973ee53344ca9bbb1fdcea8479c8.pdf?index=true
    • http://netawuwimirixor.onlinewebshop.net/best_funny_political_quotes.pdf
    • https://63c031ef-a76e-4574-b6c7-b683c5cdde0f.filesusr.com/ugd/3a5e7a_a5c093b1550146648663e04e11bdbba2.pdf?index=true
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_5fa6f7d21daf4659bd902c0eac003523.pdf?index=true
    • http://bitines.myartsonline.com/74661522995.pdf
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_3829b73ed89947f1bc76e1bc47306479.pdf?index=true
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_43f6d51791d9489ba644dae263f0687c.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_off0000f69c.bin
ab37394219f52a187d883aea0df1504d13079b40eefed9aeca3c1cfc70592a2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF69C 5084 bytes
font_01_sfnt_off000107ec.bin
11106f050b8e288d9ccdd0e144d399cf81899d39cf2962a1c2fc4160952d94b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107EC 10616 bytes

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