Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59e2ae70c79ecba…

MALICIOUS

PDF

81.7 KB Created: 2021-03-10 04:00:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9ca658e89b84382c7fcffefd041dba93 SHA-1: 088e9efa410fc30049c081e2879a16f866657ec5 SHA-256: b59e2ae70c79ecbafeb370f6ef1ec0f941b90f4d87624752bbcd4c914d776884
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. One prominent URL, 'https://resalured.ru/award?keyword=partners+in+crime+agatha+christie+book+pdf', is presented in a way that mimics search results, likely to trick users into clicking through to potentially malicious content. No scripts were extracted, but the PDF structure and numerous external links are indicative of a phishing or content-scraping attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://resalured.ru/award?keyword=partners+in+crime+agatha+christie+book+pdf PDF link annotation
    • https://rudoliretumuw.weebly.com/uploads/1/3/4/8/134861944/ef442.pdfIn PDF document text
    • http://romeital.space/2010_lexus_rx_350_bumper_cost93zuh.pdfIn PDF document text
    • http://bufaturofonoko.22web.org/icy_veins_wow_warrior_leveling_guide.pdfIn PDF document text
    • http://triple-doska5.club/70769666237ejcyc.pdfIn PDF document text
    • http://vquest.website/172057477211fab5.pdfIn PDF document text
    • http://putinoid.ru/9815527217668txl.pdfIn PDF document text
    • http://mishgen.com/woodworking_project_plansly68y.pdfIn PDF document text
    • https://dubanivexog.weebly.com/uploads/1/3/4/3/134331992/wexusiviwidapil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/3983626515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c85bc0-1123-4336-91b3-51c1fe8730a3/xofutuzebuner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ba35e56-2985-47d8-90d4-2cc6009dac6c/betrayal_at_house_on_the_hill_2_player_variant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15bb0043-ff8f-4a0c-bab7-906a7bb553ec/how_many_books_has_louis_lamour_written.pdfIn PDF document text
    • http://xoxejafomi.rf.gd/jopuvulipa.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/nuwusawojukifipizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/260d7ee3-8327-409f-b2d9-257f675f1937/bapizalalelimawavowege.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/vainglory_gameplay_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8195b044-de13-4a5a-bbb4-dc349639f899/6457354398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/813b2650-7ef6-4efe-aaf5-663e3452162e/hp_folio_9470m_price_flipkart.pdfIn PDF document text
    • http://dorediludopa.epizy.com/gefizim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21dbb8df-5871-47d5-989a-70b9ac136ef8/what_is_the_fifth_step_of_aa.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/5413759715.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_off000101bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BF 5744 bytes
SHA-256: c0376587c04aa0c26caaf91590da9d4deb1dc9e0345a397942cfd16586bd998b
font_01_sfnt_off0001151b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151B 10476 bytes
SHA-256: 9ed5a1a00eb57d15edd171f1ae340e483b8cb5d66527be77e6609edef9d54dad