Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1d58c35a7b337f…

MALICIOUS

PDF

76.0 KB Created: 2021-02-28 02:38:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 591675f1efffcaa3863bc06d98744e0c SHA-1: c227e4b08b8767ec7b8d3c5c43adfbd422ae2a69 SHA-256: de1d58c35a7b337f1e0bdd0a890546354b9432d20ed41e290aafaa9ecbbb512c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=electrophoresis+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/karapazepot/cxhdRia/find_my_friends_app_android.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/zidSrhf/jitinosevirejada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460477/normal_5ff338c71339e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490269/normal_5ffe7eec5da7f.pdfIn PDF document text
    • http://belplitka.ru/herramientas_de_word_2013_y_sus_funciones144ty.pdfIn PDF document text
    • http://mebets.xyz/fubidufuvtruo.pdfIn PDF document text
    • https://cdn.sqhk.co/rudixika/jE6xgcd/wosuridigivubinakenudubur.pdfIn PDF document text
    • http://toxedixekerej.22web.org/priest_leveling_guide_classic_gear.pdfIn PDF document text
    • http://lozhobelir.space/tivamulekoruseniluvurhk17f.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/gfhd3pb/boteziriwaloloselakazo.pdfIn PDF document text
    • http://dronextactical.xyz/64544033021z6vai.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466680/normal_5fe8d0e162985.pdfIn PDF document text
    • http://vereffka.xyz/91867080554o4twx.pdfIn PDF document text
    • http://lukofaduxaxa.22web.org/dusebowanevadanozawafaxun.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/T63ijid/renadakug.pdfIn PDF document text
    • https://cdn.sqhk.co/jututumogu/1oVKFjd/filling_large_holes_in_yard.pdfIn PDF document text
    • http://bevubupowin.22web.org/where_would_babylon_be_today.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fujafinu.epizy.com/biphasic_liquid_dosage_form_wikipedia.pdfIn PDF document text
    • http://nuxijezusuwep.rf.gd/twitter_photoshop_template_2019.pdfIn PDF document text
    • http://gasigigi.rf.gd/agriculture_tools_names.pdfIn PDF document text
    • http://ruguwozud.epizy.com/fajogimovoke.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_off0000ee3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 5132 bytes
SHA-256: ec5bb9e84974811ba471818f043c5f50ad04eb60e019d982204e3a92df1cd765
font_01_sfnt_off0000ffc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC2 10176 bytes
SHA-256: ae58581e0e96ddbec6e10993786e6ee1305012187d5637560b2ccee5b94e3194

Open this report in the interactive analyzer, or submit your own file for analysis.