Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc21064524e40751…

MALICIOUS

PDF

103.0 KB Created: 2021-03-01 07:40:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 301c49d9eae7b650d0595f3cea252b3f SHA-1: 4252442817a5841e2f4127a76c686d19e6488bfa SHA-256: fc21064524e40751df89dae8a2f51ddd538d15ebc5ad0c6165b0892867646207
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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/wix?keyword=stream+avatars+battle+royale PDF link annotation
    • http://kefets.xyz/aspen_hysys_9._0tagqg.pdfIn PDF document text
    • http://kimujitotam.22web.org/the_basketball_diaries_movie.pdfIn PDF document text
    • http://foyou.store/android_names_a_to_zzugmo.pdfIn PDF document text
    • http://familyit.pro/27209126068ntf3q.pdfIn PDF document text
    • https://damanula.weebly.com/uploads/1/3/1/8/131856109/xekelozobukixi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481166/normal_602928e8c9f48.pdfIn PDF document text
    • https://lutunorozepilaw.weebly.com/uploads/1/3/1/4/131438778/1056627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464702/normal_6011c3fda2e06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446774/normal_60367d8375c40.pdfIn PDF document text
    • http://tiktokfrance.fun/pm_awas_yojana_online_form_2018tm131.pdfIn PDF document text
    • https://mugokirupela.weebly.com/uploads/1/3/2/6/132681863/sifalixavarobubedul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464739/normal_5fde4f5a98dd6.pdfIn PDF document text
    • http://purpless.vip/brahmastra_by_ajay_gulati_free_download0xahe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/91313910700.pdfIn PDF document text
    • http://joxisuzu.rf.gd/bihar_board_matric_result_2012_marksheet.pdfIn PDF document text
    • http://vodugesivizere.epizy.com/polycarbonate_sheet_glazing_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/l_attacco_dei_giganti_stagione_3.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/application_of_plant_anatomy_in_systematics.pdfIn PDF document text
    • http://luxevewalerukef.rf.gd/percy_jackson_and_the_olympians_books_series.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/freelance_makeup_artist_contract_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/their_eyes_were_watching_god_chapter_17_questions_and_answers.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E19 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off00011efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFE 5236 bytes
SHA-256: f26ef472d082b5d05a94360348b9cf0ad256a936a0d65fad64520d06e5c59a4f
font_02_sfnt_off000130b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B5 3584 bytes
SHA-256: fa62d8c22847746145ed9f9255e4ea92f738e87518661471ab74efc17b3714d2
font_03_sfnt_off00013f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F0D 15564 bytes
SHA-256: 7a6b5b575a15feae79c25f14d86724450c563be588986913fcd19ff6a75d4533
font_04_sfnt_off00016ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FF3 16340 bytes
SHA-256: 0a5b84d2588fba97773324183171e5160b4a8361e756eafd1aff99c6c29670ef
font_05_sfnt_off000185a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185A7 1736 bytes
SHA-256: 5095ccdfdd328c3f25b1766e9c65bca58fa839170fcb9f3db3c20e130d955aff

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