Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb540524f73a8ea2…

MALICIOUS

PDF

74.8 KB Created: 2021-02-22 03:49:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5093e01a4e66790080596334b022c6df SHA-1: 2ab35445ee3dc88d3a1bd0bdb7a725a25653a3b7 SHA-256: eb540524f73a8ea25ce722021d33761f7f59e0cdc24e70856f5c68aa9b841c41
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful sites. The presence of embedded URLs and the PDF structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wb?keyword=el%20conocimiento%20silencioso%20carlos%20castaneda%20pdf%20gratis PDF link annotation
    • http://copyrights-notices-helps.com/621629165248fwk6.pdfIn PDF document text
    • https://cdn.sqhk.co/taxeseta/idjcPsF/levasoja.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/jjjfWhf/best_no_button_jeans.pdfIn PDF document text
    • https://cdn.sqhk.co/zokelofid/R5Mgiic/76099991663.pdfIn PDF document text
    • https://cdn.sqhk.co/rutunidosaw/X1ATieL/tevipebimivinovezan.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/evYgg80/zaremokomarari.pdfIn PDF document text
    • https://cdn.sqhk.co/gopepilexafi/Rhdxgf4/unlimited_free_vpn_betternet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471960/normal_5ff6752cc6368.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/0bifjjf/bad_day_at_black_rock_full_film.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454822/normal_60135cda3c2d4.pdfIn PDF document text
    • http://usacreditreport.info/19768600807cua5.pdfIn PDF document text
    • https://cdn.sqhk.co/piwizogir/ebifjcc/46669687001.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/iaXGgdK/mirrorless_camera_black_friday_deals_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_60254b6f693bf.pdfIn PDF document text
    • https://cdn.sqhk.co/teforoke/Rjddzhh/68750710249.pdfIn PDF document text
    • https://cdn.sqhk.co/dijobika/ROWTCsO/whatsapp_stand_alone_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/gghdhe2/indonesia_visa_on_arrival_for_business_meeting.pdfIn PDF document text
    • http://sayfelengs.space/kajozidedb7wij.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/75734039761e3gv2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/53976868929.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/devudutenavinulotoben.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_off0000d80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80B 5432 bytes
SHA-256: 70fa075e536e1783236fb65322ac85c3d4aa86c4b403cc627efad25df9f29efc
font_01_sfnt_off0000ea6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6A 2012 bytes
SHA-256: 992315b7afa541c246418d50ae298d4c0c52fa89e22a406eca06571bc34ece04
font_02_sfnt_off0000f412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF412 12128 bytes
SHA-256: 195d0d46d4a2cc53553dfe4e3c46a0791512a74155ae95346541501a0494ab10

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