Malicious PDF — malware analysis report

Static analysis result for SHA-256 42bfc3d3d3fce3e9…

MALICIOUS

PDF

82.5 KB Created: 2021-04-28 23:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a9e4e336836fe4d4811455bd11bda10e SHA-1: 7f20e170761311438ca590079a629e18912936b6 SHA-256: 42bfc3d3d3fce3e97cd1267d1dbb6e1d619eb65c1a853e1a5b091b9ccf431307
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites, many of which are hosted on disposable domains. The primary lure appears to be 'how to day trade for a living', suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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/strik?utm_term=how+to+day+trade+for+a+living+epub PDF link annotation
    • https://vakexojukesazi.weebly.com/uploads/1/3/0/9/130969985/kiripumekezobaduso.pdfIn PDF document text
    • https://sevisexabokiro.weebly.com/uploads/1/3/1/6/131637038/kokebe_gobudi_dibes_popebisoje.pdfIn PDF document text
    • http://miraluvofizobe.medianewsonline.com/how_to_build_a_plastic_bottle_greenhouse.pdfIn PDF document text
    • http://sutobep.getenjoyment.net/76156673244.pdfIn PDF document text
    • https://jipunone.weebly.com/uploads/1/3/5/3/135349916/7c7c54d6b4e2e.pdfIn PDF document text
    • http://tapavinologo.mygamesonline.org/pdf_file_reader_free_download_for_pc.pdfIn PDF document text
    • http://sozapemogoz.mygamesonline.org/37735128164.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/zibow.pdfIn PDF document text
    • https://tufakuxumiwe.weebly.com/uploads/1/3/1/4/131454237/nogasugoto.pdfIn PDF document text
    • https://mojivuza.weebly.com/uploads/1/3/0/7/130775228/jiwofu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gogujigasad.onlinewebshop.net/gadovevazusasarimefo.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/tetokemolitizuxulezibapaf.pdfIn PDF document text
    • http://subejev.rf.gd/wugatinibon.pdfIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_9a1bafce4cd34efb8b4c2349353055bd.pdf?index=trueIn PDF document text
    • https://acaa17bf-cf2e-4132-a9e9-810271eb8bc4.filesusr.com/ugd/ab5b4c_ac26fe8a91754614a5c22606b849e4da.pdf?index=trueIn PDF document text
    • http://tazisurabitej.epizy.com/ley_de_salario_minimo_en_puerto_rico.pdfIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_3aadbd149b554b2b874daeceb458ccce.pdf?index=trueIn PDF document text
    • http://megigezorozo.atwebpages.com/xujonazudebot.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/2416038529.pdfIn PDF document text
    • http://dirujuwut.epizy.com/vefetupolutake.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/39422607492.pdfIn PDF document text
    • http://zunonaselopa.rf.gd/wizunalobiloxozopugorig.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/entry_level_hr_cover_letter_template.pdfIn PDF document text
    • http://sesoxupapalu.rf.gd/how_to_take_apart_a_vitamix.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/comic_template_app.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_off000100ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EC 5384 bytes
SHA-256: 83da7eba7a8a93af319e5de9820e450ce0ec7f3f4e33514ddf52bb64cd4a0b7c
font_01_sfnt_off00011368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11368 11432 bytes
SHA-256: 216949475a5b692fd829be717b34eb7507572937cb383c700e6b028c91bc3541

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