Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ae65fc5584c36c…

MALICIOUS

PDF

82.3 KB Created: 2021-03-23 19:25:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0bae8c2f618a410f2bf4f0b44ccd4302 SHA-1: ebbe6af013edf3657d1a23ccbe4dd25c89df3c85 SHA-256: d4ae65fc5584c36c10b510c1eefb5840b5ac35857f762c7dce392cd3f436e6b2
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 0.9993

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 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://seumenha.ru/123?utm_term=iglesia+bautista+reformada+doctrinas PDF link annotation
    • http://kofodotig.sportsontheweb.net/nefekikojixu.pdfIn PDF document text
    • https://xezelugewopisaw.weebly.com/uploads/1/3/5/3/135311865/rowojivomedom.pdfIn PDF document text
    • http://nulivanofika.mygamesonline.org/basetofowolel.pdfIn PDF document text
    • https://mozufakumijisa.weebly.com/uploads/1/3/5/3/135333945/duvodazumigawukaxam.pdfIn PDF document text
    • http://yatvoyya.fun/how_to_apply_for_2_year_old_childcare_funding7kptr.pdfIn PDF document text
    • http://mewudaguzexo.sportsontheweb.net/53878611952.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/sazumorifetito.pdfIn PDF document text
    • https://suvadigefutom.weebly.com/uploads/1/3/1/4/131406455/173595.pdfIn PDF document text
    • http://adyga.site/4223017658781y0t.pdfIn PDF document text
    • https://suruwizad.weebly.com/uploads/1/3/4/7/134766156/woxafumutekated_vowufaniwiji_fozumi_fuzozovisugom.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/besoragukirojasemufekox.pdfIn PDF document text
    • http://goodsun.fun/melhores_livros_para_entender_a_historia_do_brasilpadbm.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/sunbeam_heated_blanket_directions.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/sutawowirosuvuv/72937886787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d632974-588b-400c-aabd-b5aa07c6971b/twilight_breaking_dawn_part_2_watch_online_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf7ebc6e-4f61-40a5-b92d-2fc0ef90c04a/evenflo_chase_booster_car_seat_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/79173858938.pdfIn PDF document text
    • http://rijonitapadon.myartsonline.com/reasoning_test_questions_and_answers_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/air_force_1_white_and_black_tick.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/695aafc3-d436-4218-8990-c85ead80b5c6/equations_with_variables_on_both_sides_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/durafusa.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/88200330870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d8b56a-bfea-4c2e-8271-6e6cd1dda622/59871264501.pdfIn PDF document text
    • http://xotopusedewix.myartsonline.com/the_atrahasis_epic.pdfIn PDF document text
    • http://dexizijisub.atwebpages.com/english_vocabulary_in_use_advanced_michael_mccarthy_felicity_o_dell.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_off000101f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F0 5420 bytes
SHA-256: 6f367a9261d6679b23a6f8c4ed3c43260eb2aff81011fcd02f64a5e7a8a16970
font_01_sfnt_off00011449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11449 11452 bytes
SHA-256: a8e6055e1f485e64c5303d6a8008a6d727cd84c751317587feebe350bea27184

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