Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee0213ccda91ffb…

MALICIOUS

PDF

75.1 KB Created: 2021-04-08 10:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cda002703b718b77f81115c287d1b945 SHA-1: 929b956363c911f014afe50c6de61681db07cd87 SHA-256: 3ee0213ccda91ffbfa1c943db0e66b8a0f4098c6eca112005d3695ce816b6c6d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/wix?keyword=expanding+horizons+farm PDF link annotation
    • http://fevevafo.medianewsonline.com/nafadimo.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/dEiengd/solar_system_map_app.pdfIn PDF document text
    • https://pibezenasa.weebly.com/uploads/1/3/1/4/131454503/8d79d91271a.pdfIn PDF document text
    • http://ruwosiju.getenjoyment.net/what_are_reasons_to_stay_alive.pdfIn PDF document text
    • http://peguxukeziku.sportsontheweb.net/catia_v5_tutorials_mechanism_design_animation_release_19.pdfIn PDF document text
    • https://loxoxonejuk.weebly.com/uploads/1/3/4/6/134684666/4cbff131c.pdfIn PDF document text
    • https://mufosuxid.weebly.com/uploads/1/3/4/0/134040625/tawadabekolavuziju.pdfIn PDF document text
    • http://jakesubinosol.scienceontheweb.net/bass_guitar_chords_and_arpeggios.pdfIn PDF document text
    • https://cdn.sqhk.co/puzusagilem/Dhinjjd/bitububizok.pdfIn PDF document text
    • https://tidepobowajaxuk.weebly.com/uploads/1/3/0/8/130814761/popiketis-megotapezifa.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/cNQ6p9R/download_monkey_island_2_scummvm.pdfIn PDF document text
    • https://vaxamapex.weebly.com/uploads/1/3/4/0/134017084/tupuweparonoge-venujozezowuf.pdfIn PDF document text
    • http://viteroludobano.mypressonline.com/descargar_libros_de_apologetica_cristiana_en.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/31dc3ad6-8980-4603-98e4-52742029bbb2/epson_artisan_835_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c18435-4fbd-4bec-afb4-b63dbc5d1a3d/wanoxirulukovadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f1f4c68-b579-49e2-bd4f-efcf04094244/99308816756.pdfIn PDF document text
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_251e182528304c76894e2089e9a50af4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e586d2a-6195-4f53-a464-e108106f073f/fusaziwaxaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a01daa6a-f92f-4f5f-98c8-c51d84cfb8d8/little_fires_everywhere_season_1_episode_3_soundtrack.pdfIn PDF document text
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_388eeb9bb5644a93905c24cb8600b43b.pdf?index=trueIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_9b528898b2d04b708b18f142cab9f6e6.pdf?index=trueIn PDF document text
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_694d579438474597bc98febdeff9290f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4695fac8-1614-4a05-81f9-22da25c56a48/69420868313.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_off0000e80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80A 5496 bytes
SHA-256: c7751b4758649d409ad94a51d9d26a1253dfb0f13de1ad0c45919b33d41faa9e
font_01_sfnt_off0000faaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAA 10692 bytes
SHA-256: 3d8570af1b854e1127b78fa9eaed9950e560b5a17f16943dd9e9f886d5a4f3dd