Malicious PDF — malware analysis report

Static analysis result for SHA-256 570de2af4dbe967e…

MALICIOUS

PDF

97.7 KB Created: 2021-03-24 02:50:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 96c390d7e670679af133781e765b2329 SHA-1: 8625706d08ea5c200652436d26be8f6fd5c9a1ae SHA-256: 570de2af4dbe967e825fa2731313e8595882ae9e273ec6e6cd3c13510e7b3711
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 0.9988

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://soxebez.ru/123?utm_term=band+of+brothers++720p PDF link annotation
    • http://mavaxur.mywebcommunity.org/building_information_modeling_handbook.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445101/normal_60073703de6ca.pdfIn PDF document text
    • http://metalllift.ru/becquer_poemasgk16m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368265/normal_5fe3399be48ba.pdfIn PDF document text
    • http://leopards.space/neet_paper_2019_answer_sheetpb008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_6023e58a3d2ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_60251d1325941.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/d1ae81de-4107-4d9a-8efb-350781357160/96869558832.pdfIn PDF document text
    • http://duxepivol.myartsonline.com/dajezokezipawaketip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f06f5a9d-d342-441e-b8e5-1391a455d72a/vujulujebisagosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/927bbc7b-28ba-4edc-971d-ebfc163e9868/how_to_start_revolution_eu4.pdfIn PDF document text
    • http://lenumizisil.rf.gd/49296572129.pdfIn PDF document text
    • http://supisozireb.rf.gd/22_clues_level_18.pdfIn PDF document text
    • http://vodupuginotipir.rf.gd/58236357501.pdfIn PDF document text
    • http://ravowimeju.epizy.com/dujutitemopisusip.pdfIn PDF document text
    • http://bemedaxo.rf.gd/best_usha_room_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be940c9e-b302-43b4-b282-a7ddcb529a03/the_wanderer_johnny_cash_lyrics_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94aea594-0da1-443f-ab96-2b333285e072/how_to_wind_a_bobbin_on_a_kenmore_ultra_stitch_12.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC10 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off0000fbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD3 3536 bytes
SHA-256: 4393ade136c007490567298207e74352831335479b0e349fe3e0fbada7b44731
font_02_sfnt_off00010881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10881 5380 bytes
SHA-256: d224b053f053689ccc71a625719dc713b96256a1cd3f1e3167a47b9aa0b85c75
font_03_sfnt_off00011ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB4 1648 bytes
SHA-256: b3bf58635a6616fd2d8175ab3fbe708eb5bfca77e3127467f16db21786c1078b
font_04_sfnt_off000122ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FF 11984 bytes
SHA-256: 798c9f67872747d07f808bf2afef544d376fe01d8c780270b0afe2bbab2d1c1c
font_05_sfnt_off00014b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B95 19020 bytes
SHA-256: 95f99dace973c9511b1f59330a4667426bcbb41d1fec48f1d1c7c532ec22e9a5
font_06_sfnt_off00016a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A3D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e