Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c02c701ea113e3…

MALICIOUS

PDF

75.9 KB Created: 2021-03-20 14:09:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1af506d6c2ba950ad946e4850e491336 SHA-1: 54b907b4a9fa130c1f0f7bfbefdee321b4dfcb78 SHA-256: 12c02c701ea113e3810685b31a67b5c1ce6824eb68427bdc1cd59053f153512a
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external URIs, many of which point to disposable domains and are structured as a link farm, suggesting a phishing or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of embedded URIs and the link farm heuristic indicate a likely attempt to redirect users to malicious content, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://leonvi.ru/wix?keyword=autocratic+leadership+examples+in+business PDF link annotation
    • http://penerete.66ghz.com/bixolon_srp_350_plus_ii_driver.pdfIn PDF document text
    • http://euromarket.pro/18344479427bhqhh.pdfIn PDF document text
    • http://zetanujagakane.iblogger.org/98630056660.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/SggMfia/57996502264.pdfIn PDF document text
    • https://cdn.sqhk.co/genonitag/XhgQgev/97696999474.pdfIn PDF document text
    • http://bluetea.space/zagidubogelobazotufazusem583yc.pdfIn PDF document text
    • http://logefekur.22web.org/nodone.pdfIn PDF document text
    • http://bluebadge-support.com/79695496736z4uek.pdfIn PDF document text
    • http://rotixumuzu.22web.org/tubijef.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/yABjiGO/magic_dream_tiles_bts_games_2019.pdfIn PDF document text
    • http://toxedixekerej.22web.org/20673143670.pdfIn PDF document text
    • https://cdn.sqhk.co/jikubivev/bPhchca/types_of_blood_groups.pdfIn PDF document text
    • http://artistichomesolutions.com/los_tipos_de_archivos_de_publicaciones_digitales_ms_comunes_sonimn4v.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedijudibo/ico2igK/tapatomebutef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://povuputuk.epizy.com/relusomasuxukun.pdfIn PDF document text
    • http://gaxodisesi.rf.gd/elementary_differential_equations_11th_edition_by_boyce_diprima_and_meade.pdfIn PDF document text
    • http://tefegofesewo.rf.gd/arduino_ide_for_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b2c75e-6a52-47af-9016-dcd7e776fa19/jomenaxazezajisaxive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd46ced4-df73-47fa-a56b-0662328228b3/is_big_little_lies_available_on_amazon_prime.pdfIn PDF document text
    • http://kixomeremit.epizy.com/29163174138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17b24cae-af16-41b2-a114-edfa8683c72d/how_to_reset_rca_tv_antenna.pdfIn PDF document text
    • http://karadefega.epizy.com/java_8_lambdas_o_reilly.pdfIn PDF document text
    • http://lamuverifob.epizy.com/puvamasekefawe.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_off0000eb87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB87 5508 bytes
SHA-256: 1ac1ad4aa22c4d182117a7d3364528cfd766bddfb9514d67e4b5bf4b3005d670
font_01_sfnt_off0000fe10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE10 10832 bytes
SHA-256: 2226970187c7adbad28e7b4663135c9b0ba1cfc5ccf2db38d1db0ed301303f53

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