Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c220cd45fd652d…

MALICIOUS

PDF

76.8 KB Created: 2021-04-23 20:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e24e42db00ea2c19b3ea45f7654f9541 SHA-1: de4e8e9f620042f2e51e2be7630b34462be43f82 SHA-256: 99c220cd45fd652d0a25d7f5b6c9228fa6108ee323a188ee52385c9bc17cc401
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://baarspo.ru/strik?utm_term=do+starbucks+employees+get+health+insurance PDF link annotation
    • https://cdn.sqhk.co/vimexuda/jrHjahR/day_trading_strategy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485005/normal_602fd5c89de6d.pdfIn PDF document text
    • https://cdn.sqhk.co/lilajibusizu/Hehjghj/game_genie_codes_sega_genesis_mortal_kombat_2.pdfIn PDF document text
    • http://themarkuzmusic.com/kenmore_sewing_machine_tablef23lf.pdfIn PDF document text
    • http://robinmani.site/vavelunekisitabtuld.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_5fe891b1bf88a.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/zjQtgcM/busori.pdfIn PDF document text
    • https://cdn.sqhk.co/xejoxoka/jhhhIid/cat_flying_in_space_meme.pdfIn PDF document text
    • http://kefets.xyz/xbox_1_controller_power_cordg6znc.pdfIn PDF document text
    • http://hookup754.fun/what_is_the_moral_of_the_lion_the_witch_and_the_wardrobes69w1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472491/normal_6015550711b3d.pdfIn PDF document text
    • http://wisecredit.info/44594323979or0vq.pdfIn PDF document text
    • http://suzuxef.22web.org/bootstrap_form_search_button.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/cicNuge/instagram_captions_and_quotes_2020_lyrics.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/rikolesafuwofar/gracybee_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/fawixukixewame.pdfIn PDF document text
    • http://kutelitowolobe.rf.gd/rawog.pdfIn PDF document text
    • http://mitefarosut.rf.gd/ride_the_tiger_evola.pdfIn PDF document text
    • https://0c43c058-97b3-435a-b041-a9f001bfa883.filesusr.com/ugd/791d74_ffd4c9482ba24edd9c8d636e4403715d.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_edf40de6c65c4ed2a7a301ce77db1af8.pdf?index=trueIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_d10e6b54448a4b8dbf6835db7a5d1782.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/jajibowuxazexedipowonido.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_off0000edd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD7 5652 bytes
SHA-256: 9268e328770f5547eb91b91c58d96338067f104bba3c8b17605f68a216210fea
font_01_sfnt_off000100f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F6 10760 bytes
SHA-256: 8a0a07c468c1dd60439d4f10a71d542c9924abc2e292e4e1f1f7d641f9590c06

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