Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e5685e84ec11ff…

MALICIOUS

PDF

72.2 KB Created: 2021-03-21 09:31:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 99d289a58477ca50c14e3b89a2ad6163 SHA-1: d05fa36c8ef00adaf9df25606e07eb4d6bdeb5f1 SHA-256: 47e5685e84ec11ff9a80615f7f975e62328f2cbdc8bec7e4913f7249ef0f9a31
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple embedded links, with a critical heuristic identifying a redirector to malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to an 'LG smart TV user guide', likely intended to trick users into clicking the malicious links.

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://dafemum.ru/wix?keyword=lg+smart+tv+user+guide+pdf In PDF document text
    • http://nitiwomifigurod.mygamesonline.org/jifejovakot.pdfIn PDF document text
    • http://cparta.moscow/bangla_english_video_ingrsysf.pdfIn PDF document text
    • https://tavutapakewig.weebly.com/uploads/1/3/5/3/135399939/xisoferiwotiza.pdfIn PDF document text
    • https://tudaluvakagovax.weebly.com/uploads/1/3/4/6/134614365/tamijitipuj-tajikodunawida.pdfIn PDF document text
    • http://kirudoxidezogu.22web.org/mojajaxavapokoroki.pdfIn PDF document text
    • http://jotetimaral.22web.org/64839512073.pdfIn PDF document text
    • http://teasmall.space/microsoft_word_creating_document_sections05pd3.pdfIn PDF document text
    • http://snail-case.store/mavorigedibenisegipabakq6wwb.pdfIn PDF document text
    • http://ninuxalezopo.getenjoyment.net/45838467767.pdfIn PDF document text
    • http://safagiko.iblogger.org/like_a_tempest_in_a_teapot.pdfIn PDF document text
    • http://pomirkapa.site/461786024018a15v.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/midef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jukikusikodopom.epizy.com/27632768471.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/garmin_945_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/ac_circuit_analysis_cheat_sheet.pdfIn PDF document text
    • http://nepopenezum.rf.gd/46164620498.pdfIn PDF document text
    • http://nibubatovavav.atwebpages.com/acid_bases_and_salts_class_11_notes.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_off0000dc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9E 5328 bytes
SHA-256: d8726e84670725ad6f5ce6ab9875cd526233e94bc52aa81a06504eae6cd00d26
font_01_sfnt_off0000eeba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBA 10944 bytes
SHA-256: 16dbcc7f9b89eeb4978703015d25f0828aa4f188e03fb9da650e1d1d37a731af

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