Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46640c49de36171…

MALICIOUS

PDF

90.8 KB Created: 2021-02-19 05:49:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 46f5f4fdb83898a5f1715ba8fc1e4ef6 SHA-1: 3ffea5d57ebf39ece3176157a2bbb970fb6a3a3f SHA-256: c46640c49de36171052ff01e49d8cb9802e94e912f752f5038efcaac2bf15c75
126 Risk Score

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-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://baarspo.ru/123?utm_term=motivation+manifesto+audiobook PDF link annotation
    • http://teren.fun/69961590978c0yjl.pdfIn PDF document text
    • https://zorikibezoxima.weebly.com/uploads/1/3/1/3/131384208/mexojajurew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407784/normal_60243a21b392d.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/ihbhhif/81706355672.pdfIn PDF document text
    • https://mojivuza.weebly.com/uploads/1/3/0/7/130775228/tafukagobuzelesuvote.pdfIn PDF document text
    • http://organicsss.space/mathematics_of_finance_garrett57psu.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/iicjFQo/nuwejegekudiratulu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464521/normal_5fee1b3197119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447641/normal_5fd613ca2a83a.pdfIn PDF document text
    • https://varozowixofifop.weebly.com/uploads/1/3/0/8/130814066/dulimisemisidaf.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/1hiahbu/huey_freeman_boondocks.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453100/normal_5fe1c4d3bb39b.pdfIn PDF document text
    • https://segalupozido.weebly.com/uploads/1/3/0/7/130738693/62723e.pdfIn PDF document text
    • http://smartradiobf.ru/barcode_reader_api_for_androidesxjo.pdfIn PDF document text
    • https://tetufimaburovi.weebly.com/uploads/1/3/4/0/134098130/1601218.pdfIn PDF document text
    • https://cdn.sqhk.co/repejuvovod/a8hgJxT/background_music_mp3_for_functions_free_download.pdfIn PDF document text
    • https://lizotolagodega.weebly.com/uploads/1/3/4/4/134495854/6863958.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/fofeguj/73565791118.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/gakibadoka.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/artificial_intelligence_tutorial_python.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.orgIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23D 5196 bytes
SHA-256: eaf16b87d92a3868362d078b613ed6b421daf811845bcb0ee1e7e8a1d49952d8
font_01_sfnt_off0000f3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E8 6396 bytes
SHA-256: 6a86cdfa43ad4cd1007923a7e8dcc72d1c054edbccb85bc29f9ed0e8dff9fc5d
font_02_sfnt_off00010529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10529 11072 bytes
SHA-256: c660a07300cccbdbec2c15ccc27d0d05906ff122f3060ff538ba620a5824947a
font_03_sfnt_off00012a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A95 16168 bytes
SHA-256: 0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3
font_04_sfnt_off00013fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD6 9172 bytes
SHA-256: 17a455217a9b9264f4cc9ad6442ab8962d3a003bc0985350e6c49ab41db40206