Malicious PDF — malware analysis report

Static analysis result for SHA-256 03236dbae0e9b436…

MALICIOUS

PDF

73.4 KB Created: 2021-03-01 22:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: afa3efc5a9e390a9c854775885641ff0 SHA-1: 3cee4a7b17ce37ad3dddd690a1c3540749a16d23 SHA-256: 03236dbae0e9b436a9a78a20bd9c48f3f979987572a17721c8f58dc5a33b572c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. The presence of numerous external URIs, including one pointing to 'fokemale.ru', suggests an attempt to redirect the user to malicious content or download a secondary payload. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the idea that the document is designed to trick users into initiating a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/award?keyword=what+is+4+p PDF link annotation
    • http://rajukilodagoje.mygamesonline.org/49017419583.pdfIn PDF document text
    • http://icub.tech/towenabukosixut9fa.pdfIn PDF document text
    • https://peturenu.weebly.com/uploads/1/3/4/4/134401199/6017912.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/79481803934.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/grammar_lessons_for_esl_studentsqoch7.pdfIn PDF document text
    • https://cdn.sqhk.co/xalesikozip/OghKKPs/smith_s_food_and_drug_las_vegas_hours.pdfIn PDF document text
    • http://smotrikino.fun/commodity_credit_corporation_cares_act5y9k8.pdfIn PDF document text
    • http://serikanipesemo.iblogger.org/gegovoterusiwelusoxa.pdfIn PDF document text
    • http://verification-help.business/vlc_android_tv_usbtdre4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lexalerov.rf.gd/precios_circo_de_la_chola_chabuca.pdfIn PDF document text
    • http://fipinajamidab.epizy.com/especies_amenazadas_en_el_ecuador.pdfIn PDF document text
    • http://volajigatume.epizy.com/treaty_of_guadalupe_hidalgo_importance.pdfIn PDF document text
    • http://rifazos.rf.gd/wisconsin_dnr_construction_site_inspection_report.pdfIn PDF document text
    • http://xevivalekivo.epizy.com/mugikufawakasilaxojelipa.pdfIn PDF document text
    • http://tugoxejemikoze.epizy.com/braid_pc_game_free.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_off0000e5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FA 4880 bytes
SHA-256: 6401c4fb1f25e3a4edb7b553c82819bbb56843c0936b6ffbc7f0885b75b6ea34
font_01_sfnt_off0000f6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A8 10184 bytes
SHA-256: acfd894444d0004715c51fbc27f5120f1f360722fea2361952f0a63b00e0fe56

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