Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b7c0e8adc82c60…

MALICIOUS

PDF

78.4 KB Created: 2021-02-16 03:50:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 77fef47591afcc442a0e66d55371f07d SHA-1: 86c7e16721d72759e95e1e10fe560644ccb77fee SHA-256: e0b7c0e8adc82c601692f8d0d38480f91993364e9f32e61477047f1869343a65
214 Risk Score

Malware Insights

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

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=how+to+administer+meds+through+feeding+tube In PDF document text
    • https://cdn.sqhk.co/wituruxa/hcn4b2X/tefoba.pdfIn PDF document text
    • http://abreudesigns.com/putar0o3p2.pdfIn PDF document text
    • https://fitatopiwize.weebly.com/uploads/1/3/0/7/130739398/1bfea6f868513.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/Pgdbhea/n64_emulator_apk_mod.pdfIn PDF document text
    • http://topfrag.rip/describe_yourself_in_three_words_interview_answer0pjpc.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/que_es_politeismo0u5j2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493881/normal_5fdd35eef0235.pdfIn PDF document text
    • http://cashfree.store/free_ringback_tones_for_android_phones61x8w.pdfIn PDF document text
    • http://arenaprobet.com/36339962518cic8j.pdfIn PDF document text
    • http://vinorama.fun/4632664723863cyy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476590/normal_5fdb0fe89e53b.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/igP4Ggd/cowboy_rams_game_score.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/bicicib/gumball_3000_rally_2006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410674/normal_5fe794908528a.pdfIn PDF document text
    • http://vknacruckalaikov123.xyz/pefatajinafiruvideczic.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/lanubili/72117282752.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/29826711101.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/34866618691.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/n64_emulator_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/lamivu.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_off0000f5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C4 5484 bytes
SHA-256: d5a6c544ddd07e5072a0b993668e351fbbbefb972ed51f8254b7c1465602c7d5
font_01_sfnt_off00010850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10850 10304 bytes
SHA-256: bc2e506270d67edf041bdda87b85c00ca84ebea0aef59f2c7d8ced1a17d916d5