Malicious PDF — malware analysis report

Static analysis result for SHA-256 127722c008fc5f95…

MALICIOUS

PDF

75.5 KB Created: 2021-03-25 17:24:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 001033a5c8c7f65d4bbb2337eb829d7a SHA-1: 5b0852082897441041a6e02da2e7a4795324a588 SHA-256: 127722c008fc5f951a1500e4e08e78b5b6f127bc95c7166d7b3661cb9b1cdc5a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farming or phishing. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external PDF links, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://mezovuduw.ru/wix?keyword=echinoderms+answer+key PDF link annotation
    • https://cdn.sqhk.co/zowonefaso/5eF1hij/rozajasuxexamutove.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/aQ0a7ic/kufufogabunigisiwexamijus.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/iczjbie/8421226755.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/vhjjbxL/regevuzikuwalor.pdfIn PDF document text
    • https://cdn.sqhk.co/madosodu/jcOjaij/gexoweduxog.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/7ihjihd/nanomukevok.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/2jlYIRk/wubinesuwixatiwexow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wujapu/gogalorupekunobi.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_07a1d88439a041e295be6bf73b773c2f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fexuror/fleur_de_lis_sheet_music.pdfIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_24be5750aeb74ab3af6b865a9c461cd0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bagisi/fewepukupolemupixaveruv.pdfIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_59b27fdad41148ceabbbf8e7adb4def9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tarajix/how_to_reset_rca_tablet_with_keyboard.pdfIn PDF document text
    • https://eb22cd64-ba88-4d74-9269-d2b8937e52af.filesusr.com/ugd/3b217d_72af68cc06e5441eaaa691f506b2b77d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/cv_format_for_ca_articled_assistants.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/rijufusalovutuvegax.pdfIn PDF document text
    • http://dejedizanabi.epizy.com/math_problem_solving_grade_2.pdfIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_db111b1efe374456ab61eb34bcc050a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/cimbali_m29_manual.pdfIn PDF document text
    • http://jopavufugas.epizy.com/gaxidijot.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/wwe_highly_compressed_android_games_apk_data.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/90797941007.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_off0000e8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EC 5364 bytes
SHA-256: bf1a04da22a1d9988dfe2c3eadbe9c60aa01f983d51a5bed63e642a7378d41de
font_01_sfnt_off0000fb19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB19 11016 bytes
SHA-256: 3230e430e98db59300b1590744d7d20acc0c784d030a5387251a6b1adb027ff6

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