Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc8f5a3f488212b6…

MALICIOUS

PDF

86.0 KB Created: 2021-03-30 14:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ce62120075e316aeb0de02c48107e982 SHA-1: db1988388a39f0da38d346e3f42d3e55d15cb918 SHA-256: fc8f5a3f488212b66c84bef39c51af99d30692d91097ffa77d34dcb5da765a60
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 0.9991

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://jacksth.ru/123?utm_term=basant+panchami+hd+images PDF link annotation
    • http://shopeuro.pro/146675709463igpq.pdfIn PDF document text
    • http://kevufeduwatawos.mypressonline.com/alternating_current_notes_for_class_12.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/still_alice_book_how_many_pages.pdfIn PDF document text
    • http://hhizmet.com/nijegikusoposoxeluzria4n.pdfIn PDF document text
    • http://tehnopolis.org/how_to_factory_reset_ipod_nano_4th_generation_without_itunespr9ox.pdfIn PDF document text
    • http://tonemisi.medianewsonline.com/mavudevajomube.pdfIn PDF document text
    • http://viwavidif.getenjoyment.net/miwududeput.pdfIn PDF document text
    • http://solifixogalek.mypressonline.com/kebafefuzavinete.pdfIn PDF document text
    • http://axecheat7.xyz/13340278676ygz5g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_dce3f7c062de4de5ac828f86ab553f99.pdf?index=trueIn PDF document text
    • https://20e8ec16-a7ca-487e-906f-4b2d5c2744e2.filesusr.com/ugd/ab81b8_9ac76b5d61e9493b8aa3ab9d566f38ea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xarojapi/49314987074.pdfIn PDF document text
    • http://jusopetikikij.onlinewebshop.net/sigexozez.pdfIn PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_3729a6457dbc4b2f9a8fa50c4db73cb1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/tuwuxasakabomemaxiseziwup.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_f6c821386a8642a0902bee3f867bf040.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/samajerolivulonezisat.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/aeneid_book_10.pdfIn PDF document text
    • https://d38713d8-f9e0-49bf-8e72-3f46774ce551.filesusr.com/ugd/b3faf5_3f924c4f4b734c1b8e197c9762a45948.pdf?index=trueIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_a7ffa4ba27414e259fc1d295b960d79f.pdf?index=trueIn PDF document text
    • http://gipebevu.atwebpages.com/taclane_kg-175d_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/razafexus.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE815 5408 bytes
SHA-256: 07fff946c46faef94954de5c84ecaab8278a176e0f78bdb70e95a58d20927cdd
font_01_sfnt_off0000fa4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4F 1936 bytes
SHA-256: 73983ccd477f0e4c07634362c0f9f13a23cea415a26bff37f7f125d59a681190
font_02_sfnt_off00010392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10392 11144 bytes
SHA-256: 42f1e4d701cc0159afb8d60a505794fd9b0cdd25e747d0d6b952a23fc5e92ab7
font_03_sfnt_off000129b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B8 10164 bytes
SHA-256: 747242b80c912f20222375d25a4350e4581e129cecb4926b8117a5e550f91b25

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