Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf4174758042658…

MALICIOUS

PDF

74.2 KB Created: 2021-03-18 05:44:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 992d248025911fa3395691dff3fb94fc SHA-1: d0934f16adbe1bd223112081e7966e951be1be99 SHA-256: 7cf4174758042658d945a1a98c783b9c66ec05f6ee9be0b28ef99a4d26d1f177
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 0.9996

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://jumiwimov.ru/wix?keyword=salones+de+fiestas+en+tijuana+economicos PDF link annotation
    • http://fuzubijixulux.mygamesonline.org/rixigokatopudurakineviw.pdfIn PDF document text
    • http://santecmb-sarl.com/washington_football_team_2021_mock_draft_picksvje0g.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebegawiwa/d7fIhea/99068776964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385231/normal_60465a7f46848.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367925/normal_5ff7e233706f7.pdfIn PDF document text
    • http://vuroxinizona.scienceontheweb.net/metode_riset_akuntansi_keperilakuan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_602ac047cd1c7.pdfIn PDF document text
    • https://cdn.sqhk.co/kimokajuz/gic6Sib/feed_the_monkey_jailbreak.pdfIn PDF document text
    • http://skywonder.space/international_days_august_2020_ukrz9hm.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/hjhg7ih/beach_survival_island_2017_movie_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385230/normal_5ff7ce6ed8550.pdfIn PDF document text
    • http://notdull-eng.online/jezupi4cbqm.pdfIn PDF document text
    • http://naturaitalia.space/26980949086h2rgl.pdfIn PDF document text
    • http://copyrightshelpcenter.com/dymo_labelwriter_450_twin_turbo_troubleshootingl1qx3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_37605a10502143868aec65a165e1983e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/yellow_pages_uae.pdfIn PDF document text
    • https://de99c131-68bf-4271-bcef-cda292486844.filesusr.com/ugd/f5892c_aa2f7233a17342fa8f11c2eac845f9c4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/letter_g_beginning_sound_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/aruba_2930f_48g_poe_4sfp_switch_datasheet.pdfIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_8e4e5461749e42b6bb0160cb9992512d.pdf?index=trueIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_b426c2c70eab43c79c7f9c99db615663.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42E 5132 bytes
SHA-256: 1c6831208fa4b504e07b0aa69c0225d738919293ab7fba6b2ba55a88bd9e4371
font_01_sfnt_off0000e58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58A 11816 bytes
SHA-256: e8fddde7a6e99c0ad27491b86d93e7a91f392557acbf903415f864cb110814aa
font_02_sfnt_off00010b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B93 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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