Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3972eac0c6060f…

MALICIOUS

PDF

84.3 KB Created: 2021-05-09 20:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bc5c8a0435106c26618d1a5c39533840 SHA-1: 77cb289aa5ed416f39ff3c4b8a7c76b42a3b0f76 SHA-256: 3c3972eac0c6060f25348a919600eb4a13f90e4a9efda014fe72a7dfaa5b2000
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that redirect to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the presence of numerous external URIs and the link farm heuristic suggest the document's primary purpose is to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/strik?utm_term=how+to+write+a+sad+poem+that+rhymes PDF link annotation
    • https://cdn.sqhk.co/wedowetaso/jem95hb/arikil_pathiye_song_karaoke.pdfIn PDF document text
    • https://cdn.sqhk.co/bodujemep/jbY3HE1/turbo_drift_3d_mod_apk.pdfIn PDF document text
    • http://ehaberdevlet.com/cheapest_flights_belfast_city_airport_to_glasgowiq4qr.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/lLxhhoV/37339834317.pdfIn PDF document text
    • http://fb-ig-violation.com/pufanorarifr3wdp.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/8WvjghA/merge_duck_mod_apk_download.pdfIn PDF document text
    • http://blockingscenery.com/wopimekojawuraz37pn7.pdfIn PDF document text
    • http://investmag.org/twas_the_night_before_christmas_poem_christian_versione2fno.pdfIn PDF document text
    • http://wiroban.22web.org/zabutefe.pdfIn PDF document text
    • http://pokypka.xyz/496518383769neaw.pdfIn PDF document text
    • http://keksik24.ru/philips_respironics_system_one_remstar_auto_a_flex_service_requiredm7pmv.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/wheajeJ/83305453991.pdfIn PDF document text
    • http://lngcliente.com/beat_the_market_gamexpk8n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_fe2b8d307f1042088f95921c485e5b0b.pdf?index=trueIn PDF document text
    • http://luwatejanif.epizy.com/pifurizis.pdfIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_db3559f1b4c644ec967ff978c5c154d8.pdf?index=trueIn PDF document text
    • http://wemosoxa.rf.gd/homophones_worksheets_for_grade_10.pdfIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_cf256a84c4904711a9d4eee199e15f4c.pdf?index=trueIn PDF document text
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_c13f4eaf609548ce8e8951576310da6a.pdf?index=trueIn PDF document text
    • http://taxupot.rf.gd/most_important_full_form.pdfIn PDF document text
    • https://f2182bdb-ca8e-4fe7-b379-f84e14eeb57e.filesusr.com/ugd/026bcc_19f01906cd53438d93305b6d56ea28f1.pdf?index=trueIn PDF document text
    • https://b42dfab6-8227-42c4-8fe5-fc04d9433513.filesusr.com/ugd/a9a8df_f8c5ed35248242668398de505b7f7153.pdf?index=trueIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_e1d648843e47432095d075dce244ff9c.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B74 5320 bytes
SHA-256: 4e9d07149b760aad065d94aeef115ed6e3566122fcaccf669d302b49971ef9ac
font_01_sfnt_off00011d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D74 11092 bytes
SHA-256: 5db27874d882b68c821fe16202f4b6a514e8714d2eae44f597a02dce546b506a

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