Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a25387012e6c4d…

MALICIOUS

PDF

88.5 KB Created: 2021-03-20 22:26:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 85bb225f1d43d3f7f88824bf8087396b SHA-1: aa9203f07833f60200a46c4d12f2623c090234a6 SHA-256: e9a25387012e6c4d464231da41c96ba14436eadeb1df666418dee72f8343f5a1
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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=watch+real+steel+2+online+free PDF link annotation
    • http://spainwow.pro/sorting_3d_shapes_venn_diagram_worksheet_ks1j7cx9.pdfIn PDF document text
    • http://helpcopyright-service.com/59838855825i8qg9.pdfIn PDF document text
    • https://cdn.sqhk.co/xurilopotun/hgThhJo/sd_card_won_t_format_write_protected.pdfIn PDF document text
    • https://natumelazorog.weebly.com/uploads/1/3/4/7/134711419/ruwigelidekitabibabo.pdfIn PDF document text
    • https://safesawugu.weebly.com/uploads/1/3/2/8/132814337/getadurom.pdfIn PDF document text
    • https://vexepediv.weebly.com/uploads/1/3/4/6/134668456/2635658.pdfIn PDF document text
    • http://gabubixaj.22web.org/kifowafibujebab.pdfIn PDF document text
    • https://cdn.sqhk.co/xenojepezere/Tjb3iia/79406036837.pdfIn PDF document text
    • http://videohost.space/65245109355zmop4.pdfIn PDF document text
    • http://fogexiduk.22web.org/zizokobosakutesa.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/tididEN/putting_makeup_in_slime.pdfIn PDF document text
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/nebapelaxixofo.pdfIn PDF document text
    • http://fabermanufacture.ru/4539408041760wq5.pdfIn PDF document text
    • http://pexiwaz.iblogger.org/71246971023.pdfIn PDF document text
    • http://arfesopt.com/wivokosiwenebezowerasg61j.pdfIn PDF document text
    • http://talajifit.mywebcommunity.org/attestation_d_hbergement_la_banque_postale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://levegukesiwus.rf.gd/john_deere_lx176_hood_for_sale.pdfIn PDF document text
    • http://bopadem.rf.gd/panchdev_atharvashirsha_download.pdfIn PDF document text
    • http://gapefixuwaxa.epizy.com/the_bluest_eye_summary_chapter_7.pdfIn PDF document text
    • http://dizakopalelur.epizy.com/sipanumorofep.pdfIn PDF document text
    • http://tuvajitivozozek.rf.gd/92152392664.pdfIn PDF document text
    • http://rivebop.epizy.com/dewalt_d55146_troubleshooting.pdfIn PDF document text
    • http://rodisasedozax.myartsonline.com/black_and_decker_classic_iron_instructions.pdfIn PDF document text
    • http://kagurajujit.rf.gd/39718302535.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_off00011c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C73 5116 bytes
SHA-256: 9a1b27ab5b14cc11f1a2755eb61c9acd571436083356d20458ccc5acf24d2b9e
font_01_sfnt_off00012de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE1 11508 bytes
SHA-256: 328b3f0dbdd999e63dcbd7d4e2d6a2a8b66bab28be7b08714d23f736f69fd4f2

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