Malicious PDF — malware analysis report

Static analysis result for SHA-256 282f09ac6f103f9e…

MALICIOUS

PDF

73.0 KB Created: 2021-03-08 20:48:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 43508d0dd2ce8bde3e4b40d7521cba67 SHA-1: dca675739f848371a37d6b0da02c292868f31e15 SHA-256: 282f09ac6f103f9e6dd37cda579f45123a63bfca27c9e1f21db042ec122a354f
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and the overall structure suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=how+do+i+make+homemade+pizza+dough PDF link annotation
    • http://videohost.space/39332154558tbnyz.pdfIn PDF document text
    • http://jowivuv.22web.org/93461866617.pdfIn PDF document text
    • http://foyou.store/84810818677d3fgo.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/local_culture_ap_human_geography_definition9s4xw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuzebelinebofe.epizy.com/chonburi_font_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb806408-2bf1-458b-962c-734f23ba5609/lumuwatolarogivefodita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d42607de-da9d-4931-925d-cd850665b533/ejemplo_de_una_comunicacion_entre_dos_personas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d260a449-7a3f-4783-b47e-066209d69183/25163738161.pdfIn PDF document text
    • http://dojeranorered.epizy.com/gajugabujenijunogotiz.pdfIn PDF document text
    • http://zolelakibexibi.epizy.com/basic_power_electronics_mcq.pdfIn PDF document text
    • https://b615eccc-4413-4b1d-8109-ede925130a83.filesusr.com/ugd/0994f9_aa030507bdab47db9e0fc12d7712ef89.pdf?index=trueIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_755b45a00b094285a6a0c8d90b50505c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fcd47a8-da92-4a33-99cf-55aa7af6d729/bhagavad_gita_in_gujarati_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5938b4e-da53-4981-96dc-b24e78c2cc35/vevinixefaz.pdfIn PDF document text
    • http://medojowibapij.epizy.com/faxevin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d46c261-1c0b-4dc6-8ec0-e40b00c890fd/all_canon_star_wars_books_in_chronological_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41a49604-d34b-46bd-b059-5ab26378e061/5845971433.pdfIn PDF document text
    • http://tojopoxirer.rf.gd/neuropsychological_testing_for_adhd.pdfIn PDF document text
    • http://gijuvaginitawaz.epizy.com/free_epson_ink_pad_reset_utility_l360.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_off0000e22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22B 5232 bytes
SHA-256: 9cd3d1b00ec6cf470aaddbd4d16e48815d87c3ace6efb0721282b4410390545a
font_01_sfnt_off0000f3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EF 10208 bytes
SHA-256: dc2eafaa26d3fabfc29a396c2da2c9d237fc6efafcede06231e5a406ac734af5

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