Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92a77d1ed0ca9ab…

MALICIOUS

PDF

77.0 KB Created: 2021-02-24 15:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cd22c6950533f8351bc68f62e82cb333 SHA-1: 9662e641c7084f1e47b468db049afa65cdbb06e5 SHA-256: e92a77d1ed0ca9ab74a35087dc0ba3263f8cde5a0299ffe68a019d3595cf6f9b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=fund+balance+classifications PDF link annotation
    • http://fasekafalig.scienceontheweb.net/imperial_leather_mcclintock_summary.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/honda_rebel_300_price_in_india_launch_date.pdfIn PDF document text
    • http://hurleyshamburgers.com/the_nightshift_before_christmas14l9b.pdfIn PDF document text
    • http://penageli.getenjoyment.net/resumen_del_libro_mil_soles_esplendidos_por_capitulos.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/why_is_my_tv_screen_have_lines.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/zedakakuzavofesobufibufa.pdfIn PDF document text
    • http://smm-target.ru/lokudefojidui2c0k.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/86069469023.pdfIn PDF document text
    • http://punejew.mygamesonline.org/84184466196.pdfIn PDF document text
    • http://golixudib.mypressonline.com/53811559933.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/what_are_two_examples_of_wastewater.pdfIn PDF document text
    • http://topsol.xyz/dell_optiplex_790_drivers_for_windows_7_32_bit_free_downloadi0cbw.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/quote_from_the_little_prince_about_stars.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://supuwevul.atwebpages.com/mezofabavaxadexaxogukekit.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/vubebasirilusadolato.pdfIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/92466487044.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BC 4896 bytes
SHA-256: 5afbe2bca183b2b0f6fe3d8f09eac462256e51deb44dc6224278e556d04cb5ec
font_01_sfnt_off0000f66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66C 9900 bytes
SHA-256: 3fe86d24ef7c6e45eea04a25f61115b71c3403acbf79bb5e026ef419cc072051
font_02_sfnt_off0001184d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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