Malicious PDF — malware analysis report

Static analysis result for SHA-256 83643dbf3b66e360…

MALICIOUS

PDF

75.4 KB Created: 2021-03-10 00:55:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2db565ba76312ddb74ea7029eaf7829f SHA-1: eecd77575205682f956c69ba5e21d1fd21363d16 SHA-256: 83643dbf3b66e360ddc0f798bc7d97a2b6751d7e4529db0103662886841f2911
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 0.9991

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://midufefew.ru/award?keyword=deadpool+kills+the+marvel+universe+1+pdf PDF link annotation
    • http://juwupexutaval.mywebcommunity.org/16665231857.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379236/normal_5ff501b2902f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465908/normal_60304cec37c4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473410/normal_603040b758cb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408981/normal_5fcb682d57532.pdfIn PDF document text
    • https://ramilelajebow.weebly.com/uploads/1/3/4/6/134647205/7d1b53.pdfIn PDF document text
    • https://xidexoxopu.weebly.com/uploads/1/3/6/0/136025366/11b68fe1c24f645.pdfIn PDF document text
    • https://xizuzumuk.weebly.com/uploads/1/3/2/6/132682261/lerufimiwikebif-gupusezowujo-xagakijedilozix-vaxez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460690/normal_603030a0a4d34.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jizotitumeviw.rf.gd/bilufugow.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/whatsapp_status_punjabi_song_2019.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/how_do_i_put_my_maytag_washer_in_diagnostic_mode.pdfIn PDF document text
    • http://gikunipif.epizy.com/90599714457.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/cdc_zika_virus_guidelines.pdfIn PDF document text
    • http://zivonupawidam.atwebpages.com/57433007993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f21ffd2-4d43-4f45-9faa-c49aa1a2e79d/ziwikiletafesabidu.pdfIn PDF document text
    • http://fojinejadasetax.epizy.com/report_echeance_pret_immobilier_casden.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/patafapovuwavotusuxuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f92beb3-0890-4d58-a9f7-1fc8c225e766/what_plants_are_edible_in_the_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a99ddb-a31b-40db-a3e6-b98560dbaf40/how_do_i_get_a_replacement_remote_for_my_vizio_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d3116f-bba6-471c-917a-877dffd5e182/priscilla_shirer_armor_of_god_week_1_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2269c356-ca10-4136-94ae-83b49f73b8e5/13694169351.pdfIn PDF document text
    • http://zenejifawulo.epizy.com/juralixoguvopidi.pdfIn PDF document text
    • http://fozufululuk.rf.gd/zebelepoj.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_off0000eb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 5456 bytes
SHA-256: 6092b5d654dabd63a2679c3b056b97213486ac53a5b1a665e8e18827cb299a5b
font_01_sfnt_off0000fd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD92 10144 bytes
SHA-256: 4c35819bc83687048edb41afaefd58d3c6c8b4c9b2901eb4d6a4bd564f9d9835

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