Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c5e02eff80c8d78…

MALICIOUS

PDF

103.4 KB Created: 2021-03-17 07:31:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: afb05a648ef6fa9e2a61403de1fe9ed9 SHA-1: 9578041d27ab05afdb5991c26ba35ce3a0e66cec SHA-256: 7c5e02eff80c8d785ebcea23f37942efa0ad6328ebb0face90cdc2fde9167e7d
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external URLs, many of which are hosted on disposable domains or link farms, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to a schedule or form, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://vilenefex.ru/123?utm_term=formato+cronograma+de+actividades+anual PDF link annotation
    • http://christmas-gift.ru/fefubasuwilusdaa5.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/XiGegON/top_hits_2010_billboard.pdfIn PDF document text
    • https://mudomuroda.weebly.com/uploads/1/3/4/7/134728654/6626276.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/how_to_report_two-way_anova_results_in_a_table.pdfIn PDF document text
    • https://fujidefabez.weebly.com/uploads/1/3/4/5/134512048/devalomog-jewemag.pdfIn PDF document text
    • http://lg-copyrightforms.com/brother_hl-l2370dw_not_connecting_to_wifit918y.pdfIn PDF document text
    • http://b0xberry.online/alexander_the_great_age_and_manner_of_deathtnomd.pdfIn PDF document text
    • https://cdn.sqhk.co/gutinisiv/ejegggd/belopexoxufes.pdfIn PDF document text
    • http://xunopapazugatar.medianewsonline.com/wilugurifagafituzum.pdfIn PDF document text
    • http://marketitaly.info/43682503162i4pkx.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxubefe/ifVGgex/puwazudidadinumanipugef.pdfIn PDF document text
    • https://cdn.sqhk.co/nebinefis/Khiieaf/mcgraw_hill_connect_economics_chapter_7_answers.pdfIn PDF document text
    • https://mafexanilexa.weebly.com/uploads/1/3/0/7/130739060/4484916.pdfIn PDF document text
    • http://indir-kazan.com/zegerefubyw3m.pdfIn PDF document text
    • https://dakikizubebara.weebly.com/uploads/1/3/4/8/134889455/texifipajari.pdfIn PDF document text
    • https://wuriwodek.weebly.com/uploads/1/3/4/6/134688082/12b4eb.pdfIn PDF document text
    • http://gujozulogisin.scienceontheweb.net/degradacion_del_suelo_definicion.pdfIn PDF document text
    • http://prizinsta24.online/brother_hl-2270dw_status_pageokgo4.pdfIn PDF document text
    • http://kemytbok.xyz/agenda_21_resumen_por_capituloskh5on.pdfIn PDF document text
    • http://chambrely.xyz/gorevopefukoxivik6agt.pdfIn PDF document text
    • http://grigolia-studio.ru/rubipevigududevubp76zz.pdfIn PDF document text
    • http://manuximaxemeje.scienceontheweb.net/how_to_make_simple_syrup_with_stevia.pdfIn PDF document text
    • https://cdn.sqhk.co/tabewinudeka/hYuie3U/9866097592.pdfIn PDF document text
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/c0753cebea1a1.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000136a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A7 1724 bytes
SHA-256: 787533c3313f27dccf155bf9565a56db07dac37d6a11b72542c6a50c068acf74
font_01_sfnt_off00013f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F03 5272 bytes
SHA-256: d9ca931fff40309dc80f919718a94e004027340faa2f3d8fb8ec4e804eac5ad9
font_02_sfnt_off000150dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150DD 12208 bytes
SHA-256: 62b227ea6ee4e22205d1f567911ca9bdd123fe6108c77adb333b4d272855556b
font_03_sfnt_off000178f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178F5 16060 bytes
SHA-256: d8a1a34de14a7b8fce5e51635835121d353d188f9ac9ce1e11538509fd4c5cdc