Malicious PDF — malware analysis report

Static analysis result for SHA-256 573bf0564e3943c0…

MALICIOUS

PDF

89.5 KB Created: 2021-03-18 19:10:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c4716fad6647403f02036ea7cc4de086 SHA-1: 7fb6d0ccd3ad259a7fa2db13c322f341fa5c0785 SHA-256: 573bf0564e3943c0cc8d5f3488a3dfc4959bcee2e9396efbaec141f98a0ee24e
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains, many of which are associated with link farms and redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to product searches, aiming to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://lozipotod.ru/strik?utm_term=what+is+the+best+36+inch+french+door+refrigerator PDF link annotation
    • http://bekokasutam.22web.org/25113999358.pdfIn PDF document text
    • http://sinekem.iblogger.org/nasm_cpt_textbook_6th_edition.pdfIn PDF document text
    • http://tekplafond.xyz/vorupemonuwabelittpwst.pdfIn PDF document text
    • http://optamorem.com/613713385562b2eh.pdfIn PDF document text
    • http://skidki-day.store/7698470396z4xgq.pdfIn PDF document text
    • http://erogancolumbia.site/alimentos_y_bebidas_con_0_caloraswq9r4.pdfIn PDF document text
    • http://sukutoxuwurif.mywebcommunity.org/subixal.pdfIn PDF document text
    • http://dotavulilego.mypressonline.com/33783117288.pdfIn PDF document text
    • http://dabopoxele.getenjoyment.net/kukezakatofediputuki.pdfIn PDF document text
    • http://maporirunigis.22web.org/povesetorib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://notalopelovawu.epizy.com/what_is_the_bolt_pattern_on_a_2006_dodge_charger.pdfIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_e5893c1761d340e98a2195c13e1dd379.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/drawing_bar_charts_worksheet_gcse.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/backgammon_free_for_pc_windows_10.pdfIn PDF document text
    • http://tujeruwaxotop.rf.gd/the_painted_bird_watch_online_free.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/30986774692.pdfIn PDF document text
    • http://wusozupit.myartsonline.com/edit_2_pages_per_sheet.pdfIn PDF document text
    • http://jirabasojexosud.atwebpages.com/mary_shelley_frankenstein_chapter_10_summary.pdfIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_724b86a11369465db7ea56f058efff0f.pdf?index=trueIn PDF document text
    • https://c9977776-9e37-4432-9eae-e541147807da.filesusr.com/ugd/bb6cc6_d5e728434e114133845f9f49aa1b618c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/lonotaxapamejid.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/69795189389.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/nijopiluredebe.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EB 5720 bytes
SHA-256: 4dc77dcb1ce7ef67924b8a6dd7e78b779cb71c4898bffca7cc40876139f5af9e
font_01_sfnt_off0001196a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196A 11284 bytes
SHA-256: b296048a4196c472ec7735da5d8d6bdcdd8bc9eda8db25468d10d40dd3bb2e24
font_02_sfnt_off00013ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF2 16416 bytes
SHA-256: 010b481358c26d0a5883e2d349d104a8faee312f324d90e825e483d2a5ea3386

Open this report in the interactive analyzer, or submit your own file for analysis.