Malicious PDF — malware analysis report

Static analysis result for SHA-256 354d8ff723b7a13e…

MALICIOUS

PDF

95.1 KB Created: 2021-04-12 04:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b69e2ca1661a830c854dac794fc330c2 SHA-1: 58c6b9930bb3de3e90fab8a0a7e9483c75dd75a6 SHA-256: 354d8ff723b7a13eec72c297b35467005750750aa2ecfd254ccafceea9272dcc
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to unknown domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://baarspo.ru/strik?utm_term=what+is+grounded+theory+analysis PDF link annotation
    • https://cdn.sqhk.co/kisasizaro/ibRQyie/kurabom.pdfIn PDF document text
    • http://josumewemuzob.getenjoyment.net/pomil.pdfIn PDF document text
    • http://xtina.online/wizobodobejobijamigukasa5gbcm.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/list_of_comparative_and_superlative_adjectives_and_adverbs.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/carlos_castaneda_italiano.pdfIn PDF document text
    • http://romeita.space/8005925726xn7if.pdfIn PDF document text
    • https://nalivugubogepa.weebly.com/uploads/1/3/0/9/130969323/ed956f86.pdfIn PDF document text
    • http://wildber.store/zobimixabnv4u.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/5hbrlhg/45720927547.pdfIn PDF document text
    • https://cdn.sqhk.co/favosejo/iibhagc/free_download_mp3_for_iphone_8_plus.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwifemi/gjgjRhj/inflatable_pac_man_ghost_costume.pdfIn PDF document text
    • https://tokugariwonudaz.weebly.com/uploads/1/3/4/3/134316825/11cc722f8d2e2.pdfIn PDF document text
    • http://jetavof.sportsontheweb.net/buku_belajar_membaca_untuk_anak_tk.pdfIn PDF document text
    • http://parrrtner.xyz/the_emotionally_destructive_marriage_by_leslie_vernick0dzyw.pdfIn PDF document text
    • http://mantenancie.com/google_books_death_in_the_afternoon4eviw.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
    • https://s3.amazonaws.com/nasitevu/unitypoint_methodist_hospital_npi.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/thoth_tarot_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/6957158109.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/draft_defence_template.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/2019_tamil_movies_in_tamilgun.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/15011692016.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/timeribafakamidutosadaru.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/fisog.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_off000128b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B3 5084 bytes
SHA-256: d679d66ed02a468423f3f09ea0f6d6072d36e9375f252b21e2d3a9df3aa07f6a
font_01_sfnt_off00013a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A02 11648 bytes
SHA-256: 62f84e4031435757990f334d5a843d0237af4d844f3f41d08caae9cff51c4569
font_02_sfnt_off0001619b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1619B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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