Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fc0206d2d292bf…

MALICIOUS

PDF

79.5 KB Created: 2021-03-21 22:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a290609eb2f86173c717dfb70c256019 SHA-1: 53bbd69057a803b1ed6859c16a362c7a449c4c21 SHA-256: 95fc0206d2d292bf77eabff3ed2540345450301167d30c943f9f21f52946648d
126 Risk Score

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 0.9964

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/wix?keyword=can+you+adopt+a+kid+in+skyrim+without+dlc PDF link annotation
    • http://nafarami.medianewsonline.com/linadigiwob.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/canon_powershot_a560_memory_card_error.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407306/normal_5ff7c60dac28d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414849/normal_5fdc05217f976.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_601258db588d6.pdfIn PDF document text
    • http://jevakogubosu.22web.org/hsc_marksheet_2015_tamilnadu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459785/normal_60426e24a8fe2.pdfIn PDF document text
    • http://volulolusawaz.mygamesonline.org/what_is_meant_by_loosening_of_associations.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424400/normal_6041dc76e894c.pdfIn PDF document text
    • http://pojibuvuj.mygamesonline.org/ruxuxowagusajitamukeji.pdfIn PDF document text
    • http://mudikovarew.mygamesonline.org/personality_test_sanguine_melancholic_choleric_phlegmatic.pdfIn PDF document text
    • http://kunujunekedi.mygamesonline.org/holmes_lifelong_tower_air_purifier_filter.pdfIn PDF document text
    • http://funiwigurogamu.iblogger.org/lofosotag.pdfIn PDF document text
    • http://pozezan.mygamesonline.org/23503881069.pdfIn PDF document text
    • http://dikebar.22web.org/what_is_the_difference_between_cohesion_and_surface_tension.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejarisiwudu.atwebpages.com/play_school_admission_form_format.pdfIn PDF document text
    • http://duliwijedij.rf.gd/18368817124.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/fotarubuvezibozuda.pdfIn PDF document text
    • http://bovuzigaratufob.rf.gd/totenobiwidajukimikeko.pdfIn PDF document text
    • http://nakobebujem.epizy.com/cefr_english_placement_test.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/arere_yekkada_yekkada_full_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/longman_business_english_dictionary_free.pdfIn PDF document text
    • http://zegisaxan.rf.gd/vobazupufusadawazudefunow.pdfIn PDF document text
    • http://zogosugo.onlinewebshop.net/black_and_decker_air_swivel_vacuum_brush_not_spinning.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/messenger_apk_latest_version_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/5591442210.pdfIn PDF document text
    • http://ruviseturitexor.epizy.com/comcast_remote_control_codes_vizio_sound_bar.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_off0000f7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 5476 bytes
SHA-256: 83289af057d2ac5b05d13be7613ca69e1384e5c352fafb8cdc9a45ceab1bbb8e
font_01_sfnt_off00010a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4C 11108 bytes
SHA-256: cec20bda6dd9832e89c261a04b69ff9efeb8cca8cc6cc4737ab74a25d5e22e95