Malicious PDF — malware analysis report

Static analysis result for SHA-256 9618458927f24f7f…

MALICIOUS

PDF

79.9 KB Created: 2021-03-05 04:09:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 46a5327d09d98308a5a3284c5f2d0abd SHA-1: 97030c20ba96c486c4337b12b65b3e06d96081b2 SHA-256: 9618458927f24f7f8a9a1c27488b240a4dd0b66071f02be8d0edd98c8388db49
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 0.9998

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://maypoin.ru/wix?keyword=webroot+com+secure+download PDF link annotation
    • http://hugertely.xyz/tosavukznb8.pdfIn PDF document text
    • https://cdn.sqhk.co/puwetudul/X85jaWK/25932182955.pdfIn PDF document text
    • http://smartradiobf.ru/dti_business_name_registration_form63904.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/zewuxon.pdfIn PDF document text
    • http://paypallsecurity.com/what_are_2_types_of_operating_systemagim9.pdfIn PDF document text
    • http://czecheducation.space/lokotibibil0s7ms.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/zelofiv.pdfIn PDF document text
    • http://disconto50.info/399088624570g8c2.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/nDiiXgc/hair_fashion_1980.pdfIn PDF document text
    • http://a-trvl.ru/76258923812w7pwr.pdfIn PDF document text
    • http://inmyshtangen.xyz/fitusipu3olwt.pdfIn PDF document text
    • http://allostar.buzz/far_above_cayuga_s_waters5kvxf.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
    • https://uploads.strikinglycdn.com/files/c4c9172b-7a61-463b-951f-bbbbdb9d9e95/2004_chevy_malibu_lt_v6_for_sale.pdfIn PDF document text
    • http://gakuxalodakedaj.epizy.com/34576732180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07f5debf-26ae-4c45-a280-3c130e5010a8/lord_of_the_rings_trilogy_books_set.pdfIn PDF document text
    • http://gugamofizuxeg.epizy.com/everquest_leveling_guide_1-_110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38bba639-fc00-46aa-a894-51d9ef48157f/applied_machine_learning_in_python_github_quiz.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_off0000edbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 5164 bytes
SHA-256: 809baf3d147cbb99a816a257387dd0cf319281f722598e3869b21ad31de6c4b1
font_01_sfnt_off0000ff43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF43 10976 bytes
SHA-256: fc7cf737762296e30742050ed268fc599423162cc481f5507667445026fbc675
font_02_sfnt_off00012493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12493 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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