Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabdea881e9bd9d6…

MALICIOUS

PDF

92.8 KB Created: 2021-03-19 09:36:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5bb3e3bbbb13c9fedb035e4faa187b5c SHA-1: 78d2103f02fb9a39d20f3fabbc514b2f485a1e02 SHA-256: fabdea881e9bd9d621a22839f033eba2c3031faaaa36bbffa77f342f0f3b8f74
194 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable domains, indicating a link farm designed to distribute malicious content. The heuristic 'SE_INVOICE_LURE' suggests the document's content is intended to deceive users into clicking these links, likely for phishing or malware delivery. The ClamAV detection and ML classifier further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://soxebez.ru/award?keyword=wbsedcl+new+connection+application+form+pdf PDF link annotation
    • http://mizifasurogik.mywebcommunity.org/nuwajapilafuwuvidabaton.pdfIn PDF document text
    • http://pikegupima.medianewsonline.com/13472308833.pdfIn PDF document text
    • http://fenellalucynelle.info/bikonaperadofewae0ez1.pdfIn PDF document text
    • http://circulshtangcalip.website/jivejitugozagocy8z8.pdfIn PDF document text
    • http://ceiling48.ru/nixilupesezetova6qbdc.pdfIn PDF document text
    • http://just-gopro.com/nelarojodusobukanolfuy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e59b058-afbf-4ff2-9769-0ad24dc37020/nupalejuwovamutefuz.pdfIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_5b041bb1251a40749d3eadac8e2b1dee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/33a26568-2bf2-4477-b173-4b4dccf0e9f9/96821145304.pdfIn PDF document text
    • https://a6f18165-9bfd-46c9-8f51-0ab50cd0b687.filesusr.com/ugd/265c7a_96145a1b07134a738a3f990e04b96703.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2502292f-8fa5-49e1-8ee2-90ee8c287ebe/mebajufoz.pdfIn PDF document text
    • https://8607b5f8-c2b2-49b7-a314-b17bd4efff40.filesusr.com/ugd/d99252_7cc3b675d1e048ee931e39124823453f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/00996a86-0a0f-49ee-901d-d75560c4286a/cashier_training_course_in_johannesburg.pdfIn PDF document text
    • https://314a97e4-cc7b-499c-a999-42b15fb65c39.filesusr.com/ugd/fa4a73_fdc6e593af6b433caac69012d2a154d8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/69734161-694a-4d84-bb16-4d9b273445ff/nareve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae162e65-6e80-4bff-8333-7bd574ed294f/2008_ford_escape_hybrid_wont_start.pdfIn PDF document text
    • https://b8e64ff8-a522-4625-8e91-70fe47930cb2.filesusr.com/ugd/37987b_16cfb078b4a54b59b1acf57b44c5bce6.pdf?index=trueIn PDF document text
    • https://00eaa6b3-f026-4720-b00f-fafb40066352.filesusr.com/ugd/d498be_7dd5cbfd683d45bb92be196efde63c0b.pdf?index=trueIn 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_off0001152d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152D 5544 bytes
SHA-256: 5266310c5d97a0f8b807fd1493999ed33accfc5521b82d844d20321069f44814
font_01_sfnt_off00012809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12809 11360 bytes
SHA-256: 22d967fdb08a1fedf74e54e3de01ab9431576c2c0e8b76ed8e6ff890089e6bb7
font_02_sfnt_off00014ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA3 16172 bytes
SHA-256: 6e699eab9a6fef16b3ea923df7b93ce1c5cbd97c7a594d359cd98c90be4a35f1