Malicious PDF — malware analysis report

Static analysis result for SHA-256 662e34fc4a649ccd…

MALICIOUS

PDF

73.8 KB Created: 2021-02-09 23:48:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e260aad9136e36a6dff66ebd8df90565 SHA-1: 9b843e953f531ef1c2acdb45068c1f3ecd9cac46 SHA-256: 662e34fc4a649ccd42f1fff1f256ca5bceb80f9318fedc38c0b5fd93fa0f0ab6
126 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'Desmat label template', likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/aws?utm_term=desmat+label+template PDF link annotation
    • http://sqrab.top/62002642082quo3d.pdfIn PDF document text
    • http://kadabafomelu.66ghz.com/76381594560.pdfIn PDF document text
    • https://kazenatujexisof.weebly.com/uploads/1/3/1/6/131637291/gidamigumeba.pdfIn PDF document text
    • http://reduslim-ufficiale.website/20519153270csv12.pdfIn PDF document text
    • http://gododerur.66ghz.com/16511786171.pdfIn PDF document text
    • http://pitushok.space/zerojigofaroredanasazusnk73t.pdfIn PDF document text
    • http://wowitaly.space/76175695137ub779.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/iXgigjY/cooking_shop_chef_restaurant_cooking_games_2020_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mosugukasiba/wQhcNjd/japujifux.pdfIn PDF document text
    • https://cdn.sqhk.co/silinetufid/bA4jbju/manual_equalizer_apple_music.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/XhjuChe/94212311015.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dubabin.rf.gd/coreldraw_for_mac_full.pdfIn PDF document text
    • http://winenezufu.epizy.com/jaxise.pdfIn PDF document text
    • http://femodizabofowu.epizy.com/ielts_reading_test.pdfIn PDF document text
    • http://pitowurojagit.epizy.com/65089609826.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/comparative_market_analysis_cma_report.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_off0000e456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE456 5008 bytes
SHA-256: 2c2953cb72232bea056db285c57cf89a59424542b4e32ccfdbf68340b5857ffa
font_01_sfnt_off0000f549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF549 10852 bytes
SHA-256: 859061a0c327a6ff65ba7385b5b1ba873ed72501ef1f43472b4c16710bd4f0fb

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