Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0229b11b9eff48…

MALICIOUS

PDF

80.8 KB Created: 2021-03-20 05:25:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ec6e2d952dac91bd7630982f0de51e8 SHA-1: 60df88eb9f4f5af2cb855c081a1acc6671af57e9 SHA-256: 6a0229b11b9eff488dc0f125b4dac99e676ee39ad58e5e252e392deec64701a1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and external links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/123?utm_term=revista+natura+em+pdf
    • http://sepoxudozixo.sportsontheweb.net/genetic_engineering_book_free_download.pdf
    • http://rikafitamedad.medianewsonline.com/how_many_calories_are_in_a_krispy_kreme_original_glazed_donut.pdf
    • http://tulavesew.getenjoyment.net/lofedaras.pdf
    • http://naturaitalia.space/jegemubufinejinebuxowugajdspk2.pdf
    • http://businesslinecenter.com/57736174540e4kq1.pdf
    • http://milanbeach.fun/femesokizapevnzuax.pdf
    • http://zajilakofudo.scienceontheweb.net/ratuxesatuzis.pdf
    • http://arbitestpark.xyz/56958436489td03.pdf
    • http://gakawisogafuga.mygamesonline.org/think_of_you_meaning_in_hindi.pdf
    • http://cozyplacefor.rest/432591470294lxci.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/408858a3-d8a5-4f2e-8e2d-584572a9586a/me_after_you_book_review.pdf
    • https://uploads.strikinglycdn.com/files/98a2245f-f506-4f4e-8264-64e522b1b78a/what_is_the_displacement_xxdeltax_of_the_particle.pdf
    • https://uploads.strikinglycdn.com/files/ae531c23-2715-426a-a6c7-0814fe6e48a5/what_is_the_process_of_emdr.pdf
    • https://s3.amazonaws.com/xalexojaxipud/slack_app_free.pdf
    • https://s3.amazonaws.com/nasitevu/via_browser_apkmonk.pdf
    • https://s3.amazonaws.com/foneniz/gidoroposiwobowojuvozelo.pdf
    • https://uploads.strikinglycdn.com/files/b27cd157-9732-468e-af65-abd898f5e040/befijozorivomud.pdf
    • https://11fe2947-f393-4df3-905d-f9f3730e834a.filesusr.com/ugd/b1b16e_1d81ac1934ee4a478f9f4528a38844d3.pdf?index=true
    • https://s3.amazonaws.com/mubemutolewe/cisco_3850_fiber_switch_datasheet.pdf
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_f8c190ee7161455cb97a77b8cb30a6ee.pdf?index=true
    • https://s3.amazonaws.com/pazatuv/afterlife_game_mod_apk.pdf
    • https://s3.amazonaws.com/waxegatulo/bodoxobutivurokuxojilazi.pdf
    • https://s3.amazonaws.com/sojenozap/novedinunubalu.pdf
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_82270be1724744f8af8837610bbcb00c.pdf?index=true
    • https://4c8e72c6-e2e3-4108-adc6-102de481692d.filesusr.com/ugd/f4b4ca_e9b86014561c45b69dc575138493e785.pdf?index=true
    • https://s3.amazonaws.com/sezewu/42334707250.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faec.bin
26122ac9b18847240ddf2ab445e65e7a728d71b8e2cd0f5c93c8dbf85177e55b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEC 5224 bytes
font_01_sfnt_off00010ca7.bin
196e00820dd34f70e920e4d72d4c3005457e0e66a96d321ca3287d595daf1531		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA7 13004 bytes

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