Malicious PDF — malware analysis report

Static analysis result for SHA-256 bebafeb4e3fa5e9a…

MALICIOUS

PDF

81.2 KB Created: 2021-04-02 00:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b31e29decb247247b1e498294aac0b25 SHA-1: aee1fb71099b003a08cd9a12cad331894a3f2606 SHA-256: bebafeb4e3fa5e9a9b311868a66d616552d018a5365ffc75a9f24e00fb784833
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 0.9994

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://dugedepap.ru/award?keyword=atualidades+para+concurso+em+pdf PDF link annotation
    • http://joteruraxa.22web.org/angle_sum_of_triangles_and_quadrilaterals_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409394/normal_600fed1cb8f03.pdfIn PDF document text
    • https://nabaduvikarupad.weebly.com/uploads/1/3/4/0/134096068/rifidag.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/iJgengh/94858389101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410448/normal_5fd898b3344ff.pdfIn PDF document text
    • http://crysety.xyz/jogamozubid1nb.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/WliciiT/23720699014.pdfIn PDF document text
    • http://sale50.pro/vatatanemi7se2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446497/normal_6014dafcbb1e1.pdfIn PDF document text
    • http://true-board1.club/compatible_wireless_keyboard_for_samsung_smart_tvu7d2n.pdfIn PDF document text
    • https://zotekuruwufuk.weebly.com/uploads/1/3/4/1/134108654/kujalalagidinoj-fusarer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490366/normal_604650941caa3.pdfIn PDF document text
    • https://cdn.sqhk.co/dejijadu/iebifTK/nujaluzezimalofew.pdfIn PDF document text
    • http://show-visitor.xyz/cherrypickers_guide_201780r29.pdfIn PDF document text
    • http://fefikaniki.22web.org/4646356931.pdfIn PDF document text
    • http://useplafond.xyz/6327880266j48dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417669/normal_5fcbe599981e2.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/lemerisinivum/program_genie_garage_door_to_car_without_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/vabufumubolupiwozuro.pdfIn PDF document text
    • http://lidekajemunow.epizy.com/boss_song_video.pdfIn PDF document text
    • http://lumawasisoxo.rf.gd/52073301075.pdfIn PDF document text
    • http://zasagugidi.epizy.com/is_it_illegal_to_have_a_15_round_magazine_in_california.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/49214952918.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_off0000f9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F9 5288 bytes
SHA-256: fdfbaf6d18fa797f478b5b15d6935c036ff61499f63e963b52a7696db3b20154
font_01_sfnt_off00010be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE2 13924 bytes
SHA-256: 6eaa958dff5998c50c9a76ae76d54543c1ee46816eda1415eecd725a72032c5d

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