Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed446a9ebd13564e…

MALICIOUS

PDF

83.1 KB Created: 2021-04-06 13:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1519df21af8d9df6dae0c517c1ad8d23 SHA-1: 5485f17597a56fed8cdb49176d62549faef6781a SHA-256: ed446a9ebd13564e6df8dc0546bd710be0d1b1ad20eaea277eef1f0da0a202e1
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites, one of which is identified as malicious. The document's content, disguised as a search result for 'John Deere lawn mower seat switch bypass', is a lure to encourage clicks on these links. The presence of multiple external links and the ML classifier's high confidence score indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/strik?utm_term=john+deere+lawn+mower+seat+switch+bypass PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450242/normal_60357e1b698e0.pdfIn PDF document text
    • https://gebogunuwol.weebly.com/uploads/1/3/4/7/134732963/pasuneguwusa_galuteta_puxemofixasenap_juzaduxubepij.pdfIn PDF document text
    • https://botosedasirewen.weebly.com/uploads/1/3/5/9/135961685/begefaxidarip_lotopog_takajuruw.pdfIn PDF document text
    • https://busaluvugisegiw.weebly.com/uploads/1/3/4/3/134368440/9584720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455197/normal_5fd8a255dfca4.pdfIn PDF document text
    • https://kaxogabetex.weebly.com/uploads/1/3/4/3/134320086/9646479.pdfIn PDF document text
    • https://sepuvomaxobaba.weebly.com/uploads/1/3/5/3/135311468/xudasopexiwuvu.pdfIn PDF document text
    • https://revawovaweku.weebly.com/uploads/1/3/4/0/134013066/2068e02ea.pdfIn PDF document text
    • https://xesanojazal.weebly.com/uploads/1/3/0/9/130968931/d9e1a0832afab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_606a7d3364e03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425483/normal_5ff32501d41c9.pdfIn PDF document text
    • https://felixitu.weebly.com/uploads/1/3/4/0/134012625/gunobefa-lopukud-rijire-midajilenoliv.pdfIn PDF document text
    • https://xexigajusotojuz.weebly.com/uploads/1/3/1/6/131606060/tutudurisoka.pdfIn PDF document text
    • https://semoligi.weebly.com/uploads/1/3/0/9/130969118/1f387798bf6f9c9.pdfIn PDF document text
    • https://fiziragib.weebly.com/uploads/1/3/4/3/134345091/rokuterixufoxufu.pdfIn PDF document text
    • https://rijagadufe.weebly.com/uploads/1/3/1/6/131606992/2021905.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392656/normal_5fe09961cda5b.pdfIn PDF document text
    • https://verukutuxa.weebly.com/uploads/1/3/5/3/135330203/6734160.pdfIn PDF document text
    • https://metasabuvaro.weebly.com/uploads/1/3/2/6/132681671/wafumewawexuluno.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rexuworov.epizy.com/madame_bovary_chapter_summary.pdfIn PDF document text
    • http://zumewozuzetarun.epizy.com/best_android_heart_arrhythmia_app.pdfIn PDF document text
    • http://rexonaboruli.epizy.com/avision_capture_tool_free.pdfIn PDF document text
    • http://xuxejoser.rf.gd/hurlingham_academy_ofsted_report.pdfIn PDF document text
    • http://kivakup.rf.gd/bitcoin_miner_android.pdfIn PDF document text
    • http://dawozisi.rf.gd/algebra_word_problems_grade_7.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF73 5636 bytes
SHA-256: 386f6780dc4255bb0d623803aad4848950834aa9aac78d5ca86e2c8000d8f88c
font_01_sfnt_off00010283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10283 10940 bytes
SHA-256: 714dec894d8beea427e228bf00b85c8600f9f53cee1dfcf257117739e8336cbd
font_02_sfnt_off0001282e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282E 16448 bytes
SHA-256: 3f7f6beb0f5865f83039c8434023d34048916fbab515aea8bfee4d6c7e3f3101

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