Malicious PDF — malware analysis report

Static analysis result for SHA-256 788afcb23a852a53…

MALICIOUS

PDF

70.3 KB Created: 2021-02-27 22:40:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 68502c89e1d371c2193926501dbd1526 SHA-1: 1d012ae30a90b2ebcf5593463296b6c7dcd15f2c SHA-256: 788afcb23a852a539eb6b904a6b862811e07600fa251681d414f8d6453057db2
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=transworld+assurance+phone+number In PDF document text
    • https://cdn.sqhk.co/noviraxat/gQ0gjjb/wavidapozavuwagagadixusim.pdfIn PDF document text
    • https://totuseki.weebly.com/uploads/1/3/5/3/135322554/fozebif.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/acca_sbr_march_2021_exam_dates.pdfIn PDF document text
    • https://simisasokudu.weebly.com/uploads/1/3/4/2/134235492/kalerupa.pdfIn PDF document text
    • http://kopumiwabetare.66ghz.com/xowevud.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/pe_exam_registration_april_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/Ljdibid/93836260023.pdfIn PDF document text
    • https://paxubemimowam.weebly.com/uploads/1/3/0/7/130739876/f1c7be7a5ee7f.pdfIn PDF document text
    • https://sazunanu.weebly.com/uploads/1/3/4/5/134596286/7364001.pdfIn PDF document text
    • https://toroborelap.weebly.com/uploads/1/3/4/8/134867907/lasukojexamuba.pdfIn PDF document text
    • https://cdn.sqhk.co/jivuzukop/gHyiifF/44862294808.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://widifusi.myartsonline.com/what_is_exposition_in_a_plot.pdfIn PDF document text
    • http://kunuwinafedib.epizy.com/compendium_catechism_of_the_catholic_church.pdfIn PDF document text
    • http://fetapewifug.epizy.com/12995077207.pdfIn PDF document text
    • http://saninov.epizy.com/sufewivulevofowafujosi.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/what_is_molar_enthalpy_of_neutralization.pdfIn PDF document text
    • http://lekozuni.epizy.com/the_travelers_gift_summary.pdfIn PDF document text
    • http://mebofubanu.rf.gd/printable_free_equipment_rental_agreement_form_template.pdfIn PDF document text
    • http://forojiwimudobo.atwebpages.com/how_do_you_identify_organizational_culture.pdfIn PDF document text
    • http://bobupugarini.epizy.com/ethiopian_new_film_2018.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/apple_ipod_shuffle_charger_amazon.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_off0000d829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD829 5492 bytes
SHA-256: ca26cd66fce64d8daa960fd5d1b3c4529b10a136c7dbb18e32c15223026fbf4a
font_01_sfnt_off0000eab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB2 9748 bytes
SHA-256: 4aeb59fd7f60894bfee3a74069a5d6a27f742c1912ed754f534fd8ed08a2d6c0