Malicious PDF — malware analysis report

Static analysis result for SHA-256 b516012ab212e0a2…

MALICIOUS

PDF

75.3 KB Created: 2021-04-01 02:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d6ed9e573b3066f88a7f1797c03941d6 SHA-1: c68de34cded724e47b803a38e4fc30325503bbb0 SHA-256: b516012ab212e0a2bc3507a30be225e4fe56f67074e77d00fda775c45a786cc3
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://bologen.ru/strik?utm_term=whirlpool+duet+ht+washer+capacity PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477877/normal_605d07f755c76.pdfIn PDF document text
    • http://pihodze.com/how_to_reset_tp-link_extender_ac750eca6z.pdfIn PDF document text
    • http://frukt.space/35698021648crxda.pdfIn PDF document text
    • http://dhl-order.info/how_to_update_apps_on_lg_smart_tv_2017lhrfx.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/english_linkers_exercisesnqvtr.pdfIn PDF document text
    • http://sudedelanefozuk.66ghz.com/aesculap_columbus_knee_surgical_technique.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454301/normal_5fe6f75b54a6a.pdfIn PDF document text
    • http://tells.fun/tojipuvumiselujujitizadaupm9q.pdfIn PDF document text
    • http://soul-felt.com/59230354638mny25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407733/normal_6003389954550.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529780/normal_6018cba267dd8.pdfIn PDF document text
    • http://podjem2.club/98022274928o9xwl.pdfIn PDF document text
    • http://pedosapabosa.iblogger.org/hands_of_light_written_by_the_physicist_barbara_brennan.pdfIn PDF document text
    • http://nidomamedop.22web.org/nofafofi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475572/normal_602626391498b.pdfIn PDF document text
    • http://mexicotop.xyz/vixuke5b9m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dogugamegomijit.rf.gd/88855229594.pdfIn PDF document text
    • http://tededuliwe.rf.gd/85129319135.pdfIn PDF document text
    • http://gutezapirasawad.rf.gd/balfour_beatty_annual_report.pdfIn PDF document text
    • http://fanesavemek.epizy.com/online_advertising_methods.pdfIn PDF document text
    • http://sidijujaz.epizy.com/ca_hng_tri_cy_nhp_khu_bin_ha.pdfIn PDF document text
    • http://bonerewutejipa.rf.gd/lubrication_in_metal_forming_process.pdfIn PDF document text
    • http://kaberitate.rf.gd/mulujajonozar.pdfIn PDF document text
    • http://magomigubilo.rf.gd/romeo_and_juliet_2013_ost_download.pdfIn PDF document text
    • http://wibumumodudofud.epizy.com/administracin_de_recursos_humanos_bohlander_14_edicion.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_off0000e716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE716 5368 bytes
SHA-256: 8b60f2d8d1029fb07a2ec7cc842762d1cd0e47a73cf7155f9dce39329bca663d
font_01_sfnt_off0000f968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF968 11248 bytes
SHA-256: 1bd37335a88ccf9dbdb5a486a5b872715f7a51b49a3554b229fff2f36f301077

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