Malicious PDF — malware analysis report

Static analysis result for SHA-256 400df080c74373a8…

MALICIOUS

PDF

77.3 KB Created: 2021-03-31 11:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b145cf92e407acd5aa7456edadf1c307 SHA-1: 570aa7c3ce796c25554c4c6f87a9ad61603b4f36 SHA-256: 400df080c74373a803ee8f1122bd75501259df7bded4a89c4cde3f38d50dde5d
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-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://ponafet.ru/123?utm_term=akira+full+movie+free++2016 PDF link annotation
    • http://vizexibidoxi.getenjoyment.net/25421755984.pdfIn PDF document text
    • http://larokamexi.sportsontheweb.net/16185927338.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/sujovasuxulijimaxapa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494888/normal_5fd3170186fa2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406456/normal_6004a58d43652.pdfIn PDF document text
    • https://cdn.sqhk.co/supetudoti/hgicVQW/23914883894.pdfIn PDF document text
    • https://cdn.sqhk.co/xakalodesi/jUbific/55225533615.pdfIn PDF document text
    • https://cdn.sqhk.co/bipuzojafa/Qiba6ha/joplin_mo_news_first.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/oghfcii/police_officer_age_limit_california.pdfIn PDF document text
    • http://zovolexune.sportsontheweb.net/aluminum_types.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/puzevewafavasumal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409239/normal_602903a8814ae.pdfIn PDF document text
    • http://wopizup.mypressonline.com/advantages_and_disadvantages_of_geothermal_energy.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/basic_acoustic_guitar_chords_chart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_03baccd1938141ffaeb11f5b852f745a.pdf?index=trueIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_2ce015976baa4be6acece6c27aeb24e3.pdf?index=trueIn PDF document text
    • http://luzojora.atwebpages.com/vakapotiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d9d2a2-8ad8-4413-886e-1284597eca78/tecnicas_e_instrumentos_de_recoleccion_de_datos_en_investigacion_documental.pdfIn PDF document text
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_9caedf23fa4b4621b57e076ac8b3220e.pdf?index=trueIn PDF document text
    • http://rogofideb.onlinewebshop.net/bioplastic_from_banana_peel_research_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c20297d7-0071-4d0d-86ea-9ac89b119d1a/18176309006.pdfIn PDF document text
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_1d6ac7e935564c42a8592871b2a91014.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d447bee-7cd3-42b9-b8f3-434888148b52/what_channel_is_fox_hd_on_dish.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA58 5328 bytes
SHA-256: 426ac69eb01dc5d1d532c2af4f2a1a11bbec63d3aff228bedab6ed3c8bd3dcd4
font_01_sfnt_off0000ec72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC72 11080 bytes
SHA-256: 68a7aab845a1925a7c64ff9337318d4a518d2c8d2e8f12554e54af2a04446a52
font_02_sfnt_off00011299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11299 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8