Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd04f1812f25929…

MALICIOUS

PDF

77.8 KB Created: 2021-04-02 18:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3e401db16c0f5ce848eaf773d6477820 SHA-1: 1f6a1f16f0d2b696c5defb30b38cf6c09dac5f20 SHA-256: 8fd04f1812f25929b41e5ca4f8e7e476216cf086cca6977e6d78ccdea96571f6
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 0.9991

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://zajinet.ru/123?utm_term=reporte+extorsion+por+telefono PDF link annotation
    • https://nekewagan.weebly.com/uploads/1/3/4/8/134881830/bepujilujoz-bosan-mikuxukapug.pdfIn PDF document text
    • http://tikovg.xyz/71573547242ppgv2.pdfIn PDF document text
    • http://hargotel.xyz/zetudimarigiduliob2co.pdfIn PDF document text
    • http://kihepc.xyz/80480632587z4dlg.pdfIn PDF document text
    • http://mif-smeh.space/how_to_write_a_self_evaluation_essay_for_workzc0ju.pdfIn PDF document text
    • http://ita-fitness.fun/lidawutafazitebisepuxijuws29wx.pdfIn PDF document text
    • https://tovalikesugijid.weebly.com/uploads/1/3/4/1/134108564/bidagufigab.pdfIn PDF document text
    • http://50offstore.info/tokoxikowvcd2k.pdfIn PDF document text
    • http://bighome.space/kamyab_jawan_form_fill_up8fh5m.pdfIn PDF document text
    • http://moreronofi.iblogger.org/9129630980.pdfIn PDF document text
    • http://zipibafof.iblogger.org/4375612137.pdfIn PDF document text
    • https://tetuxexe.weebly.com/uploads/1/3/1/8/131871535/damaxizijoromosoj.pdfIn PDF document text
    • https://revapukas.weebly.com/uploads/1/3/5/3/135323612/zizugufakevetagaje.pdfIn PDF document text
    • http://center-about.com/bhai_bhai_1970_movie_songsekjz2.pdfIn PDF document text
    • http://tublitalia.space/53226841639g8qci.pdfIn PDF document text
    • http://devlp.design/65012558618sqo6k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad397fbc-1da9-465c-b7db-4d35a7696980/don_juan_mexican_restaurant_poteet_tx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca05f434-0dcb-4922-bb3e-cd4930758c1c/can_you_file_a_lawsuit_for_negligence.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/archie_1000_page_comics_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/18408837223.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/lakaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e36546f5-8609-4276-9689-0b16174fd834/subofonobananuzokefuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/035a6654-5d16-42f5-8b5d-45dc8ac8aaa8/nopidojevolagowafuli.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB83 4760 bytes
SHA-256: cb8afb026317851686822b8b37d478ebdfa8207d7b762dcb8254146282623680
font_01_sfnt_off0000ebd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD4 11948 bytes
SHA-256: c1781593ed941b1f7bab51c5cd97474a48f07299f0b1574d590ad371d467fbea
font_02_sfnt_off000112ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FF 16144 bytes
SHA-256: f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d

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