Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f2eae1ae7c6d07…

MALICIOUS

PDF

80.8 KB Created: 2021-06-01 21:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0f19046dfb66dbeb9e00df51f04b358f SHA-1: 5e203fb71628b34ddbddb63be8834d7d14554ab6 SHA-256: 17f2eae1ae7c6d07f8550aad75e08ff3a0f615be000fb47188b4f87ccf7cdea0
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 0.9996

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://crophysi.ru/123?utm_term=accounts+mis+format+in+excel PDF link annotation
    • https://gigazafopojub.weebly.com/uploads/1/3/4/0/134040382/9912820.pdfIn PDF document text
    • https://xijaxerunoseme.weebly.com/uploads/1/3/4/3/134306079/1761105.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/3620000.pdfIn PDF document text
    • https://lusogovo.weebly.com/uploads/1/3/4/3/134358567/5507112.pdfIn PDF document text
    • https://temetufel.weebly.com/uploads/1/3/1/8/131856903/pirolufipaxosomixob.pdfIn PDF document text
    • https://daxozeke.weebly.com/uploads/1/3/4/3/134322415/f2a2dc1c977e6.pdfIn PDF document text
    • https://satalediveli.weebly.com/uploads/1/3/4/0/134018026/66b7ac.pdfIn PDF document text
    • https://lamalirigade.weebly.com/uploads/1/3/4/5/134595912/padozije-tubam.pdfIn PDF document text
    • https://joxunirefebemi.weebly.com/uploads/1/3/4/3/134319414/79e95b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fisukafetif.pbworks.com/w/file/fetch/144417099/19011153192.pdfIn PDF document text
    • http://refarumiba.pbworks.com/f/tigunekitaxutik.pdfIn PDF document text
    • http://supatibu.pbworks.com/w/file/fetch/144413595/92862161987.pdfIn PDF document text
    • http://xodelow.pbworks.com/w/file/fetch/144471444/50245104582.pdfIn PDF document text
    • http://pezeliv.pbworks.com/w/file/fetch/144423882/81082388995.pdfIn PDF document text
    • http://rijunepupuja.pbworks.com/f/bloons_td_6_apk_no_mod_21.1.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/f/96116440144.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/78411188959.pdfIn PDF document text
    • http://wozixokumo.pbworks.com/f/what_kind_of_vet_care_do_guinea_pigs_need.pdfIn PDF document text
    • http://zuvevetub.pbworks.com/w/file/fetch/144421668/zitejedo.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/f/shadow_fight_2_unblocked_games.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/f/cuadro_comparativo_estadistica_descriptiva_e_inferencial.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/w/file/fetch/144436311/introduccion_a_la_microbiologia_tortora_12_edicion_descargar.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_off00010104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10104 5084 bytes
SHA-256: df3660be00b047e4786621121fcfbdf5bbaf590bd97ff265e183bbea1f616848
font_01_sfnt_off0001123a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123A 10440 bytes
SHA-256: 80e0223f4ed9cdd1a152a1ec44aba140c1196510fec926ea935dbffe347a3c3f

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