Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fbca2dc7fbdda74…

MALICIOUS

PDF

72.1 KB Created: 2021-03-30 20:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 245bb082d5ae9c59b9cb8b2be6332267 SHA-1: 561c081606545063c043764ba192b93eda335e92 SHA-256: 1fbca2dc7fbdda74c04d4cc3510759e0899b3fa8e26721da508cd4bf7b0954df
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-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://soxebez.ru/wix?keyword=oxford+latin+course+part+3+teacher%2527s+book+pdf PDF link annotation
    • http://rixujewo.getenjoyment.net/pdf_to_word_converter_download_app.pdfIn PDF document text
    • http://jabisin.22web.org/ronodefavopizepu.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/agustin_fernandez_mallo.pdfIn PDF document text
    • http://stavki-na-sport.site/modern_family_season_7_scriptuy4rn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485309/normal_605574e38cf4f.pdfIn PDF document text
    • http://weraka.online/68191294197ihad6.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/comment_regrouper_plusieurs_documents_en_un_seul.pdfIn PDF document text
    • http://domen3.club/81375586454olsci.pdfIn PDF document text
    • http://iranomics.com/potivutibubavgzbh.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/nolalipanaxufujalukovegi.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/victoria_secret_model_diet_and_workout_plan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406241/normal_5fec8c41be63a.pdfIn PDF document text
    • http://remontnatali.ru/1st_grade_fluency_passagesl328n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kivozusemu.atwebpages.com/nordic_track_exp_1000s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/452a3c5a-fb17-4766-9da0-f02186e1ab4c/wall_street_journal_prime_interest_rates.pdfIn PDF document text
    • http://zorijefugixor.atwebpages.com/astable_multivibrator_practical.pdfIn PDF document text
    • http://luvibiw.epizy.com/encyclopedia_judaica_vol_22.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc21ca67-0cae-42f1-b8ac-b024e6743a92/relamijikubasunavokodaro.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/what_does_ptc_cust_rollover_ira_fbo_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a93d9c5-c3ec-4bbc-8efc-bb7fb4198b5b/ways_to_teach_character_traits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0820fffb-c215-4d3c-aab7-2736d2ff22d7/xuwabowanevivudet.pdfIn PDF document text
    • http://bubinepet.epizy.com/kitchenaid_professional_6000_hd_ksm6573cer_stand_mixer_6_quart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c461610-3a40-493d-9218-7c331464c916/lenetut.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_off0000d8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DB 5740 bytes
SHA-256: cfb9828d1e3cefc51865165217826b1fd76791ca7768c51ceff49d31f12e4e56
font_01_sfnt_off0000ec64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC64 11104 bytes
SHA-256: 0f9152d867f9e6f71fa56dbcf640ffe3bee1277afececa16d5ea6d3a4b190b12

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