Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3347e2514675e81…

MALICIOUS

PDF

71.9 KB Created: 2021-02-26 12:36:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fee7675f04175624a5bfeb898f8ac281 SHA-1: d8c50558496b7fee4391e89f6e5c5f14f52ddc7c SHA-256: e3347e2514675e81fe76195f85015f0b4f46ce591c7650463bc2264f67db027d
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'ffxiv linkshell npc', suggesting a lure for gamers. The presence of embedded URLs and the PDF structure indicate an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

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/wix?keyword=ffxiv+linkshell+npc In PDF document text
    • http://woxijakuzadajew.getenjoyment.net/troy_bilt_4_cycle_string_trimmer_leaking_oil.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/metodo_de_guitarra_clasica.pdfIn PDF document text
    • http://losuzibuta.22web.org/dukuliwiporibe.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/86500993547.pdfIn PDF document text
    • http://benosetib.iblogger.org/mariya_takeuchi_variety_album.pdfIn PDF document text
    • http://xonigej.mypressonline.com/81708094145.pdfIn PDF document text
    • http://vuxokiwi.22web.org/85541892107.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/how_to_turn_off_blue_flashing_light_on_samsung_galaxy_s5.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/15531535294.pdfIn PDF document text
    • http://vaxuzorokolate.iblogger.org/tenezoso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zadosuwiwebuw.epizy.com/wezokipetemoxuwum.pdfIn PDF document text
    • http://xadupozitolewoj.epizy.com/49979551475.pdfIn PDF document text
    • http://mokineso.epizy.com/great_fairy_fountain_theme_piano_sheet_music.pdfIn PDF document text
    • http://jowawaba.atwebpages.com/4075359683.pdfIn PDF document text
    • http://zugujegezamuto.epizy.com/14288022707.pdfIn PDF document text
    • http://vewajelawukos.rf.gd/archipelago_movie_parents_guide.pdfIn PDF document text
    • http://xoxozuzupa.rf.gd/nosokom.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_off0000dfab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAB 4944 bytes
SHA-256: 59cd5de95c9c7038b6449c2d82b1dcbe5449758d5284041b5ad6d3f392ff1e63
font_01_sfnt_off0000f096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF096 10092 bytes
SHA-256: a6efcbb7b75a7e8b630df2bba10f58def46bec3d3085c8008bede019ac913393

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