Malicious PDF — malware analysis report

Static analysis result for SHA-256 5960e503eadaa236…

MALICIOUS

PDF

77.6 KB Created: 2021-05-06 09:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9bbd823618cb0360eb917efac942b272 SHA-1: 40d52c2c0144df0f453bcf1259e4addac50de521 SHA-256: 5960e503eadaa23606b5ec181aa82e23162d39da44c4fc7d22f5c918609b5b2f
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=tipos+de+funciones+lineales+ejemplos PDF link annotation
    • https://vebazefi.weebly.com/uploads/1/3/4/0/134040586/756469.pdfIn PDF document text
    • http://hdvideo.design/metal_gear_solid_5_phantom_pain_traitors_caravan_walkthrough1j84q.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/2526257.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/demizenaxibe_nunuvamuf_nisit_vedifukazefot.pdfIn PDF document text
    • http://fulokixowo.scienceontheweb.net/ncert_maths_book_5th_class.pdfIn PDF document text
    • http://fosipuzo.mypressonline.com/wajefipofibajinifipunato.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/xedojibuwoluwebo.pdfIn PDF document text
    • http://rerixen.scienceontheweb.net/bradley_martyn_arm_workout.pdfIn PDF document text
    • https://malitizume.weebly.com/uploads/1/3/4/0/134097131/zezawojovon.pdfIn PDF document text
    • https://zasubimivari.weebly.com/uploads/1/3/1/3/131383839/3102910.pdfIn PDF document text
    • http://rivepozepuxar.mywebcommunity.org/botanica_oculta_libro.pdfIn PDF document text
    • http://duwudivusupo.mygamesonline.org/furofa.pdfIn PDF document text
    • http://stalekost.site/puwafegixobelo20u5n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_8184fec6976644f1b60efc85e364fce9.pdf?index=trueIn PDF document text
    • https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_fd3ccfadb97f4997b6edb14d8427d996.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waduzirader/why_was_mapp_v_ohio_important.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/48503636486.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/bangla_bhoot_fm_high_quality.pdfIn PDF document text
    • https://02664c88-84e5-42fa-aae3-682d3a0d4328.filesusr.com/ugd/39d081_8a93dac7d1414148afc7328198a988bb.pdf?index=trueIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_2764e419948c4d928bb43c08188a4a57.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_off0000ef6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6A 5228 bytes
SHA-256: 6126c4a816d0356bd137fd362b6885cdf519ae9b0449618f4c91071c34f07307
font_01_sfnt_off0001012d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012D 11596 bytes
SHA-256: 0f24a776fd9bafc5591cacaa2e9a295d55af6ad30b4cdd11c7a470d87d70d4a2

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