Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee8d0ccd2555409…

MALICIOUS

PDF

82.4 KB Created: 2021-03-23 23:58:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0455b6ca34c0216b74a0564634f51df0 SHA-1: 031b3a1ae62b9f6ad4a339284370b477752fc905 SHA-256: 9ee8d0ccd255540983eaca41255819c88310ef97e73094f8379bda6397043f20
184 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, appears to be a lure related to fixing a Samsung smart TV, designed to entice users to click the malicious link. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/strik?utm_term=how+do+i+fix+the+sound+on+my+samsung+smart+tv In PDF document text
    • http://gifagudilul.mypressonline.com/squat_toilet_installation.pdfIn PDF document text
    • http://afterdealer.pro/77941025332dgt.pdfIn PDF document text
    • http://nefutekugurenap.mygamesonline.org/doxekukixumujesafebafe.pdfIn PDF document text
    • http://nanolenka.xyz/lovowemovkm980.pdfIn PDF document text
    • http://natlab.ru/luk_catalogo_embragues0h5fw.pdfIn PDF document text
    • http://zopokujejisolan.getenjoyment.net/dragon_age_origins_romance_sten.pdfIn PDF document text
    • http://spiritstudio.ru/70060592732hfpvv.pdfIn PDF document text
    • http://poopo.ru/is_nj_issuing_real_ida5953.pdfIn PDF document text
    • http://avit0.pro/what_is_communication_in_social_caretbnyn.pdfIn PDF document text
    • http://doxisodezezaku.iblogger.org/kufil.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/fixararololu/fukixumotarazi.pdfIn PDF document text
    • http://gitodake.myartsonline.com/bakri_palan_marathi.pdfIn PDF document text
    • http://rolodumom.epizy.com/honeywell_1911i_barcode_scanner_programming_sheet.pdfIn PDF document text
    • http://bizebiza.rf.gd/gejuzepiz.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/47682632693.pdfIn PDF document text
    • http://kefixofelapadi.epizy.com/bajaj_auto_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/good_answers_to_interview_questions_about_conflict.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_off0000f760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF760 5452 bytes
SHA-256: 0de779ef7f97e2347a41a368ba6f6a155eb65f892935803174e972b1dc408dc5
font_01_sfnt_off000109d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D3 10488 bytes
SHA-256: 378e2b6a94bc0b2093ce2be60eba6deca0d753ebf99f06a2dedaf536057da3ca
font_02_sfnt_off00012dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176