Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a36e18d0c2b6c2…

MALICIOUS

PDF

85.0 KB Created: 2021-03-24 10:55:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ad0b20c026382f96827c171481200e53 SHA-1: 8523262a31f9b5e729f0fa7c0c35a6ca5f2dcb20 SHA-256: 09a36e18d0c2b6c200767ab90de7251bc27ff1171ab2aaae2f62075e38f211b2
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 0.9997

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://botokaw.ru/strik?utm_term=beats+by+dre+wireless+studio PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463810/normal_604c995ad5ce7.pdfIn PDF document text
    • http://vostokzapad.su/zasixubatapigulifq5t1j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369504/normal_5fed5ccc9d4b3.pdfIn PDF document text
    • http://znakomstva69.space/alfreds_basic_adult_piano_course_lesson_book_level_onece1dq.pdfIn PDF document text
    • http://roflan.site/vishnu_sahasranamam_1008_namesrxl02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377704/normal_60073b2054341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419235/normal_6013349d1a07c.pdfIn PDF document text
    • http://sovetnik53.ru/66786241018lb24b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424645/normal_5fd1c044e1560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475847/normal_604fa81351831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483873/normal_5fd1f121ce73e.pdfIn PDF document text
    • http://how2clever.com/zara_dilenci_mp3_indir3a1w2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426953/normal_60075330750cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416938/normal_604dc76f82b52.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4f6e396-ec5f-4a99-bb8f-a394ba8077d5/the_house_of_bernarda_alba_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/gevivumemij.pdfIn PDF document text
    • http://retelowanudugut.epizy.com/chloracne_or_acneform_disease.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/74897745787.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/7877084892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f69695f-8a0f-4ba8-9a34-130812ed9df4/muvubidalor.pdfIn PDF document text
    • http://tenurusimuxu.epizy.com/what_vegetables_to_grow_in_central_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/how_to_charge_wii_u_pro_controller_without_charger.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_off0000ff08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF08 5204 bytes
SHA-256: 059bd40362ce22658aa94116c176df5954c0bdaa767d345dda2e6d6576600b5f
font_01_sfnt_off000110d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D8 16828 bytes
SHA-256: fd7becb91aa2855bb8d13944c16e7d990a4a946abc5c442ef4b572914e13b4c9

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