Malicious PDF — malware analysis report

Static analysis result for SHA-256 763ddae8ed45edb3…

MALICIOUS

PDF

107.5 KB Created: 2021-03-15 06:41:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6e673bcb4508a84c4d53fa761794cb8e SHA-1: 98a0d452499e32a604dc78c8b5bf2257a259436c SHA-256: 763ddae8ed45edb38f1be98699d22bf8a22deb8e446f50debe85c4b9a3c58523
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 0.9980

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://xajibur.ru/strik?utm_term=jack+and+the+beanstalk+story+hindi+mein PDF link annotation
    • http://keepmaxi.space/651920642og35b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385862/normal_5fedff4fea114.pdfIn PDF document text
    • http://lishop.site/11238325394k3w1g.pdfIn PDF document text
    • http://avit0.pro/how_to_program_remstar_m_series_cpapxbnoc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401714/normal_601eedbe10dfb.pdfIn PDF document text
    • http://rodina38.ru/gdt_11_manualwjewp.pdfIn PDF document text
    • http://ratebekanolaja.22web.org/7854277404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417139/normal_6043cc859c3aa.pdfIn PDF document text
    • http://itprod.space/bird_of_paradise_bush_seedshxybl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454304/normal_5fde7ba296a2e.pdfIn PDF document text
    • http://chestlune.online/gedovuwatube4gqy7.pdfIn PDF document text
    • http://abanca-electronica.com/brain_vision_analyzer_user_manual74tqv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_782cd9e9a628490bb7e9e8c7f1c84854.pdf?index=trueIn PDF document text
    • http://bodamuma.rf.gd/powerpoint_2013_themes_free.pdfIn PDF document text
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_c95d07208235428eaa03051f415ef666.pdf?index=trueIn PDF document text
    • http://bagibuboje.rf.gd/sibitavivepagawonesamobu.pdfIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_fc16641099c64bf2a33ba77fc1205a68.pdf?index=trueIn PDF document text
    • http://katanitape.rf.gd/games_battle_realms_full_version_free.pdfIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_b4e2ac3931d54a5b82d06b004f2b3575.pdf?index=trueIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_e633f50be33443c1b15b4d29a7c04493.pdf?index=trueIn PDF document text
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_edf0f389b3d94db6b4c397e2b6e94a83.pdf?index=trueIn PDF document text
    • http://ditorodizo.epizy.com/39215952387.pdfIn PDF document text
    • https://4c80ca50-31de-4e6f-b265-471620011c4a.filesusr.com/ugd/08c6b7_24dbab7700ff494598d9286f37879f5d.pdf?index=trueIn 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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13515 5472 bytes
SHA-256: 0e200b98a214a5c444a401d6f61774320cdd3137161d428c1eb3541dcb0e36ea
font_01_sfnt_off00014787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14787 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off000152e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152E9 9716 bytes
SHA-256: e2127536d7bf3035301a2367a36e493b52fdf90b7a77ddde58ac6ccbf1364694
font_03_sfnt_off00017461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17461 13796 bytes
SHA-256: 9cd691c4cc28c37b55e19b34c7d15a018df4e81301a40848aa0e0ca3f698eb32