Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7e030fb2df72ff…

MALICIOUS

PDF

77.8 KB Created: 2021-04-04 05:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 70c3d793b6992dd02d9ee08a6a35a8f4 SHA-1: 72554f74d0ba2fe0fc412352d932886f381b61a3 SHA-256: 2d7e030fb2df72ffdcdb923527b7d5c3b29d9f4b06290609282c0f01406a8f1f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/strik?utm_term=factoring+flow+chart+algebra+1 PDF link annotation
    • http://tevituvodejifep.mywebcommunity.org/tuzanor.pdfIn PDF document text
    • http://blue-tick-central.com/petsafe_collar_stopped_working1l41c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456114/normal_5ff29d21b94f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448556/normal_5fda2fc73816d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393361/normal_60567834a0a84.pdfIn PDF document text
    • http://shishkin-seed.xyz/nobibijigamojilaeddd4.pdfIn PDF document text
    • http://pavozuketogo.mygamesonline.org/telofotewujisurarifa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450243/normal_5ffbad9be388b.pdfIn PDF document text
    • http://womovenum.sportsontheweb.net/59877461465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384304/normal_604aa3ac7d942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465545/normal_604d9e285a372.pdfIn PDF document text
    • http://kayikciakademi.com/report_de_mensualit_pret_immobilier_credit_foncierm0f8h.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7c3dd69e-6649-485e-b385-36acc2971cd6.filesusr.com/ugd/cf9ff1_a83a5ccf378047909b3fae8d2cc6d009.pdf?index=trueIn PDF document text
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_f1f0eeaf5fde4654af22476a1156ec5a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecdb41f6-5806-4f40-a9a0-994b90c18c8b/employment_policy_covid_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1544f3be-3cb5-43f0-8409-6d21387c910f/a_practical_guide_for_policy_analysis_6th_edition_free.pdfIn PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_02f7052455234a2681448a1ec2907c3b.pdf?index=trueIn PDF document text
    • http://ledufowi.myartsonline.com/distress_tolerance_dbt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c25a01dd-7160-492d-aa3b-b55c9531f2b1/womens_bodies_womens_wisdom_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d92150-b53e-4443-b72b-d06d48fdaf7f/pakebotixowurop.pdfIn PDF document text
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_00f039e9a85b472cba7fea057552e7c0.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_off0000f231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF231 5204 bytes
SHA-256: f8dd2d8a24f700e32033300e1b49ebdef551c28e89bae5aaf87768e200c4fc5b
font_01_sfnt_off00010400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10400 11144 bytes
SHA-256: d116e989d49e427c259a5dfc350bb0467c0fc9d36001b57f3dd5c6ea2f17a095

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