Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d2f748f89dfb9f…

MALICIOUS

PDF

82.8 KB Created: 2021-06-11 05:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d851a539f631054cc3bfabaa2bb6d92c SHA-1: ad797788ccc9aaf1997758963170f939669aacd4 SHA-256: 15d2f748f89dfb9fcf72ad68df3371b32b78dcb7f2c87892b580eb1d22d040cd
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with a primary one pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dugedepap.ru/123?utm_term=into+the+woods+prologue+sheet+music+pdf PDF link annotation
    • https://wovofonunubani.weebly.com/uploads/1/3/1/4/131408017/nanutova.pdfIn PDF document text
    • https://wudopivuvev.weebly.com/uploads/1/3/4/7/134752163/loduves_gebowaja.pdfIn PDF document text
    • https://turabebusaweni.weebly.com/uploads/1/3/1/4/131438207/tulezoxutanis.pdfIn PDF document text
    • https://totovipuvo.weebly.com/uploads/1/3/2/7/132740708/2cb80d4f4.pdfIn PDF document text
    • https://gowokijisamupu.weebly.com/uploads/1/3/4/4/134438950/4c2f798d94d9c2e.pdfIn PDF document text
    • https://rovividupezudu.weebly.com/uploads/1/3/4/3/134373795/40fd22f1.pdfIn PDF document text
    • https://gokajafiwewafij.weebly.com/uploads/1/3/4/3/134314986/1689845.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wikitaxif.pbworks.com/f/minecraft_unblocked_at_school_online.pdfIn PDF document text
    • http://xizalow.pbworks.com/f/57267076048.pdfIn PDF document text
    • http://bukafag.pbworks.com/w/file/fetch/144976161/zumif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a507f64-5b4b-4a39-a1bc-0696b42810cb/lowrance_hook_3x_transducer_installation.pdfIn PDF document text
    • http://gafuxexosaru.pbworks.com/w/file/fetch/144682440/biochemistry_jeremy_berg_9th_edition.pdfIn PDF document text
    • http://mumubib.pbworks.com/w/file/fetch/144413343/38456949116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1310d467-9ef2-480a-bbb0-2c1c2d4bda19/21693083108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85797a8-6f6d-48e2-8ff7-90c03fe45a1f/jadot.pdfIn PDF document text
    • http://supatibu.pbworks.com/w/file/fetch/144428739/96535859996.pdfIn PDF document text
    • http://ravowibosu.pbworks.com/w/file/fetch/144613152/fashion_icon_mod_apk_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c471339-633b-44db-96cb-c6a20bb5d64f/constitucion_politica_de_la_republica_mexicana_1857.pdfIn PDF document text
    • http://dadilotofexi.pbworks.com/f/pasos_para_realizar_algoritmos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a02cbbb6-c2a5-46bb-a07c-cdf186002b39/53076321568.pdfIn PDF document text
    • http://nudenuxote.pbworks.com/f/jetokavif.pdfIn PDF document text
    • http://kedajawi.pbworks.com/f/tuckmans_stages_of_group_development_reference.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/f/21670991747.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82B 5272 bytes
SHA-256: fb05dd123cff981349327d612715a68c1420c619283a6e9301fdaf3c87f9e896
font_01_sfnt_off000109fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FE 10456 bytes
SHA-256: 405a3ebdac04d2eb623650fec78860810321942e07cca70ed69d76a59f0a9329
font_02_sfnt_off00012db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB5 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e