Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e93558b7f3eca0…

MALICIOUS

PDF

84.0 KB Created: 2021-03-15 00:12:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 94a4458de49293560b3bddedae7533e9 SHA-1: 8e72c930df8b9efaf16bef251bdf2202335e273e SHA-256: f3e93558b7f3eca09199513e32641238ddf30834091292d71d0edf353a4c0fd8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://maypoin.ru/award?keyword=adobe+pdf+signature+invalid PDF link annotation
    • http://sk-anker.ru/sekudujiku5q.pdfIn PDF document text
    • http://blue-tick-central.com/84608620456kg3y9.pdfIn PDF document text
    • https://vakitisize.weebly.com/uploads/1/3/4/0/134017930/7824692.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408881/normal_5ff16e266da50.pdfIn PDF document text
    • https://gekibevuzoz.weebly.com/uploads/1/3/4/5/134503907/4eaf22773d14afa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_602200dbb5075.pdfIn PDF document text
    • http://batut.space/palalegapabog2mhm2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501509/normal_60076a65af7fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449012/normal_5ff65c1845cef.pdfIn PDF document text
    • http://fortuneo.biz/what_is_a_multi_stem_treeyyxzj.pdfIn PDF document text
    • https://xatefokagakutil.weebly.com/uploads/1/3/4/1/134108848/gixijafodezim_neduwumurirem_xoxodifuxokub_zifakagaxu.pdfIn PDF document text
    • http://zoomita.space/xezinidomixakuretogerov1d9n.pdfIn PDF document text
    • http://detonic-de.website/lost_in_dreams_guideuz58s.pdfIn PDF document text
    • http://themarkuzmusic.com/pleco_chinese_dictionary_free_for_pcj1fpq.pdfIn PDF document text
    • https://rarasaxemog.weebly.com/uploads/1/3/4/6/134611000/3200324.pdfIn PDF document text
    • http://basiditdcf.space/96091930866b5bh9.pdfIn PDF document text
    • http://donbetosstreettacos.com/how_much_is_a_lifetime_fitness_student_membershipkdqas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487192/normal_601c7c9267e48.pdfIn PDF document text
    • http://klyshsheff.xyz/69154413201lif6m.pdfIn PDF document text
    • http://forkidsshop.online/52408038579rdb2i.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/bokofapig/2497159987.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/55887070630.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/redemption_song_bob_marley__the_wailers_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/majekofujivejubirevepo.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/titatalatirenoxakofokok.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8C 5400 bytes
SHA-256: 7b0d4f8ab9377791c7c173b259d6d010b0e36b56686efd91ca0272be30b89ee9
font_01_sfnt_off00011cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFF 10568 bytes
SHA-256: 4465a5a93ab01eb3ff7bbc9c1d688283cd65c3a686f4299781952c67a3d79b7d

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