Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba194725d33d7839…

MALICIOUS

PDF

132.2 KB Created: 2021-04-05 19:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: eee74ff4114b03be37e8ee8815bf16ed SHA-1: 75324e367ef473d602bb05749955b8b2a23ec9a7 SHA-256: ba194725d33d7839cb278653147356c5ade9c854069ee9f0a1e3a3e56d3a31f5
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/award?keyword=bivariate+correlation+analysis+pdf PDF link annotation
    • https://cdn.sqhk.co/jogeguzotire/iejegeW/lme_copper_price_live_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/ZKENbDD/jigudojut.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/rY2jaDD/motorcycle_speedo_cable_extension.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/51074764477.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/yfEifhh/tobanerabuvanelum.pdfIn PDF document text
    • https://cdn.sqhk.co/neguvobipa/manxSjb/lopewukuwilejidawa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456140/normal_6060193b5c822.pdfIn PDF document text
    • http://mamuxorap.getenjoyment.net/altered_genes_twisted_truth_free.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/10206193671.pdfIn PDF document text
    • http://kewatupu.scienceontheweb.net/arbol_de_decisiones_caracteristicas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405687/normal_5fca4fab279f0.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/10_aphrodisiaques_naturels_et_puissants.pdfIn PDF document text
    • https://cdn.sqhk.co/robimovule/yid9Zy0/ted_cruz_supreme_court_justice.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/8Bb1NGX/miwepupodedesexukivipog.pdfIn PDF document text
    • https://cdn.sqhk.co/zuretagugaf/hgifgjb/rush_limbaugh_radio_show_today_youtube.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409250/normal_6006600a533de.pdfIn PDF document text
    • http://dekoriribazovax.mywebcommunity.org/gixalure.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/778f229f-c5e0-43ee-92f1-3adcc59efaf8/kifaxupivovonino.pdfIn PDF document text
    • http://jelunegizubu.atwebpages.com/mapa_zona_hotelera_cancun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed96a23-d1c5-43f0-bace-fa99a51d6894/23477619929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c9bf83-61ff-44b6-98c5-3440098b327b/ps_vita_games_for_sale_gumtree_durban.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80dcf004-7e54-4e6f-8b48-a443e67ccab6/f01_error_code_indesit_washing_machine.pdfIn PDF document text
    • http://xevijojikutep.onlinewebshop.net/tatenuposokabij.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_off0001a87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A87E 5360 bytes
SHA-256: 5c949204ff18d3898bf3372b5c76c48228f9af551b4a1b3f95b543d4ddc690ae
font_01_sfnt_off0001badc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BADC 14580 bytes
SHA-256: 435cebc545791d0c7ad0de96f6d84626a7a60b3e895e4349c03cfe2700fb5220
font_02_sfnt_off0001ec44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC44 16452 bytes
SHA-256: af21068acfdf6f8d51148afc214b0a7aab44d735d5fa944ce8d9989f6503df71