Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0d86bb1fa50924…

MALICIOUS

PDF

80.1 KB Created: 2021-03-28 15:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 65ac647f1c5b2ec558f5d211cb16036f SHA-1: 9c3b6e2240e13414e63f84b6aa379c3d75f4bfe4 SHA-256: 1d0d86bb1fa50924e5aadf7539c4cfe010ce1ce438ff65cda41f217c6bc3e537
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://fokemale.ru/strik?utm_term=cortisone+shot+in+knee+after+meniscus+surgery PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410714/normal_604465a83297a.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/diehiha/zujakobexolubidibopuzo.pdfIn PDF document text
    • http://siteznakomstv69.space/an_introduction_to_mathematical_reasoningw3yrv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405674/normal_60089c4c0dd93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483602/normal_5fda1b33eb783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414695/normal_6056da31ac210.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/iCAHsm2/football_coach_apparel.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/cahucI0/marshmallow_plant_seeds.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/ghRjgjc/74490848835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426822/normal_5fda53a42d421.pdfIn PDF document text
    • http://doordash.link/ill_be_gone_in_the_dark_tv_show_trailerl05wz.pdfIn PDF document text
    • https://cdn.sqhk.co/kugorazig/hhehaha/pamaxupunosuzaxo.pdfIn PDF document text
    • http://x-bionic.shop/poke_genie_overlay_not_workingpcmv8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/loxumev.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/kai_access_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/how_to_change_garage_door_code_liftmaster.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/peter_senges_five_disciplines_for_team_development.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/amoeba_sisters_multiple_alleles_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/wedding_anniversary_whatsapp_status_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/67301385358.pdfIn PDF document text
    • https://2b12d24f-0c9a-4a32-b427-430aba395f0c.filesusr.com/ugd/6cfe90_0e990859ef5f4f33ad145bc182c4bbb6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/moxofome.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/zebas.pdfIn PDF document text
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_10b9ab7031034604bf1108153c97e182.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/53170413814.pdfIn 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_off0000fbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEB 5332 bytes
SHA-256: 9c0cedd294d4adea950b43e72d2bb1f246c7e11fe7d8a92f0c17c1004f0ae63c
font_01_sfnt_off00010deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEB 10732 bytes
SHA-256: 848034977e669be86d2bf31a7cba4f00a030c7edb47d77f2bbc9debefc988f9a

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