Malicious PDF — malware analysis report

Static analysis result for SHA-256 505e1916d518489c…

MALICIOUS

PDF

83.0 KB Created: 2021-03-19 14:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 34a17f0bddb80ba82ebe61022ed99ea8 SHA-1: 96d14e44cb771f3ce6dca74ca5b980149b95a257 SHA-256: 505e1916d518489c33ea432c451f14ca0f58867934fde74f19cde73e5a2f8328
126 Risk Score

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 0.9997

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://fokemale.ru/wix?keyword=main+idea+and+details+graphic+organizer+kindergarten PDF link annotation
    • http://vsedlyatebya.xyz/minecraft_earth_map_download_1._12._27kyn5.pdfIn PDF document text
    • http://ginumon.iblogger.org/vesegusoxawelasuvexeri.pdfIn PDF document text
    • http://localdesign.me/fijoxoxekepizusefewav5n2lh.pdfIn PDF document text
    • http://zofoxexizoviro.iblogger.org/kivupuninopib.pdfIn PDF document text
    • http://c-advance.space/55179657029ve0uf.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/kibamibinelumazudirogs56o.pdfIn PDF document text
    • http://jesipuvapuse.iblogger.org/12717396031.pdfIn PDF document text
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/sagiwosumaja.pdfIn PDF document text
    • https://nibifafemebag.weebly.com/uploads/1/3/3/9/133998031/6505566.pdfIn PDF document text
    • https://mifanupomiseri.weebly.com/uploads/1/3/2/6/132681757/sitilira_naleresotimaxin_lidapodatam_xeduvedi.pdfIn PDF document text
    • http://dijepeg.22web.org/how_to_create_height_map_in_photoshop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mopafanimuwez.epizy.com/ripalutis.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/the_selection_chapter_17_summary.pdfIn PDF document text
    • http://xonitobilabi.rf.gd/70838290609.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/char_broil_4_burner_gas_grill_prices.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/bushnell_yardage_pro_4-12x42mm_laser_rangefinder_riflescope.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/mipeluroz.pdfIn PDF document text
    • http://dimonejoxu.rf.gd/kujujeludezidobunukogaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/mobazol.pdfIn PDF document text
    • http://betiravel.epizy.com/77289259108.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_off0000f031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF031 5452 bytes
SHA-256: 978bdf36b56307377d44ad14f7ced7164b5ab220eac2836ea3d0c4304b53d627
font_01_sfnt_off000102ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CE 10564 bytes
SHA-256: c8d63342df90143855d6e8f54ae3dc381217f744bd1f6eeb04665c5ad99f444c
font_02_sfnt_off00012724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12724 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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