Malicious PDF — malware analysis report

Static analysis result for SHA-256 48241dbfcba98e4e…

MALICIOUS

PDF

82.9 KB Created: 2021-04-05 04:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c87a774832d3ce3fa923f0a397d42919 SHA-1: 58c0e30eeaa4b2b81317e63e60ebc3d374e0177e SHA-256: 48241dbfcba98e4edd847dbda2ad7c3769fdecaa79009d9d87cdae6bbe2b50dd
126 Risk Score

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 0.9997

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://resalured.ru/strik?utm_term=dnd+5e+backgrounds+phb PDF link annotation
    • http://kkkirrreeee.space/pampered_chef_food_chopper_ebaycjooa.pdfIn PDF document text
    • http://fastgetme.online/18190870623tx2xs.pdfIn PDF document text
    • http://sabaroxuxonefib.iblogger.org/29073164028.pdfIn PDF document text
    • http://rajulosukoxejof.22web.org/bd_police_circular_2020.pdfIn PDF document text
    • http://wamimexololiwam.iblogger.org/suronavubaxizunebugakeb.pdfIn PDF document text
    • http://mezajozugabaso.getenjoyment.net/wiverubatipewo.pdfIn PDF document text
    • http://uchebnoe.website/a_modest_proposal_questions_commonlit_answersdj8ce.pdfIn PDF document text
    • http://enots.space/kogonifogesgbgnc.pdfIn PDF document text
    • http://pristav.pro/samsung_front_loader_washing_machine_reviewsi9lbq.pdfIn PDF document text
    • http://botanilix.mygamesonline.org/kibokeroraf.pdfIn PDF document text
    • http://nipobudagese.mypressonline.com/como_hacer_una_mini_bobina_de_tesla.pdfIn PDF document text
    • http://profer-opt.ru/60174061721b03ej.pdfIn PDF document text
    • http://subumobo.22web.org/word_unscramble_cheat_sheet.pdfIn PDF document text
    • http://visionnew.xyz/7298739358g9zaf.pdfIn PDF document text
    • http://formblckr1.xyz/24532291482zgci3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lebuloxa.epizy.com/autoestima_unam.pdfIn PDF document text
    • http://parekiwebepis.epizy.com/fumopijiposezibo.pdfIn PDF document text
    • http://tarusuja.epizy.com/88244266235.pdfIn PDF document text
    • http://garonidu.epizy.com/rujubolotaj.pdfIn PDF document text
    • http://bajivuselome.epizy.com/how_to_use_bitmoji_in_google_classroom.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_off00010646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10646 5628 bytes
SHA-256: 88aded07f411ee271c19b1dc063b63d6a541f89aed059356680a338ca6239681
font_01_sfnt_off00011966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11966 10784 bytes
SHA-256: ab237c226ddc0b1e1adf5aaf896d9a668cd2b62da634e1a3621e73ea53a91399