Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a77bb388e87c588…

MALICIOUS

PDF

81.7 KB Created: 2021-03-15 07:04:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9a71105eb6cc0fb00f6bf7373856549e SHA-1: 75f27fa9663f2ae89bc20814f64c7e0b3ecfa0e3 SHA-256: 3a77bb388e87c58871e5f0ccc547aca14df18a45f5d5ce1b13210a6fa63d4be2
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 0.9992

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://fokemale.ru/123?utm_term=bms+performance+review PDF link annotation
    • https://cdn.sqhk.co/dufolatik/iaEthdW/raza_meaning_in_arabic.pdfIn PDF document text
    • https://cdn.sqhk.co/pixorikibam/6Rjg3cQ/63395298548.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/how_to_pair_turtle_beach_stealth_700_to_xbox_x.pdfIn PDF document text
    • https://cdn.sqhk.co/perajomipe/gi9Vihl/nugezuwariduno.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/gglhgjc/3827309339.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/formula_for_average_speedhjn21.pdfIn PDF document text
    • http://usesoda.pro/65040279045swqrm.pdfIn PDF document text
    • https://cdn.sqhk.co/maduzonuxoke/A9iijbc/vikemusimowa.pdfIn PDF document text
    • http://kidiwutimako.mygamesonline.org/amenorrea_primaria_y_secundaria.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/ic6ggii/world_war_iii_1982_videos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387704/normal_60392257eb59b.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/qighcP1/jezuwisepepozadolizogiwut.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/GivWidb/ready_made_projects_for_electronics_and_communication.pdfIn PDF document text
    • http://899themes-demo.ru/kenmore_washer_model_110_bearing_replacementdo1xx.pdfIn PDF document text
    • http://interior.estate/what_do_u_mean_by_mechanical_engineering_designtwanl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485807/normal_601d06b0eb654.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/eVhhhjE/war_strategy_books.pdfIn PDF document text
    • http://gratoraama.space/bob_revolution_flex_3.0_weather_shield8rihh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sujawokasafu.onlinewebshop.net/maretabamujexadelixuxixet.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/car_seat_groups_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/continental_casualty_company_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/assume_form_traduccion.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/nosusale.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EC 5040 bytes
SHA-256: bf0c2e9037305413ee776de4862da3a8bfce279e7fb0ed1b9164391f5e9a0739
font_01_sfnt_off000108f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F7 10076 bytes
SHA-256: 0d46af1a0860b8d72d511d42dba48825b2efe461715d07505a458392d17fd32d
font_02_sfnt_off00012b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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