Malicious PDF — malware analysis report

Static analysis result for SHA-256 27bee2b124c08293…

MALICIOUS

PDF

76.8 KB Created: 2021-03-09 04:04:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8d3e079531a29b8a63518dc63631153c SHA-1: 5451418527f17a4e687a705ee414edbac97c89f5 SHA-256: 27bee2b124c08293dbc54a24a360f6ffc7cff24ecdbef240328bc722f0e8af64
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains or use generic keywords in their URLs, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/award?keyword=assemblage+bois+menuiserie+pdf PDF link annotation
    • http://lobarularexe.iblogger.org/lipuvoluxulogo.pdfIn PDF document text
    • http://finejubopitugov.22web.org/mijimagoguwogugaluru.pdfIn PDF document text
    • https://mutakisutuw.weebly.com/uploads/1/3/4/7/134768563/woriwugeseduzimobu.pdfIn PDF document text
    • https://mawubuzepegi.weebly.com/uploads/1/3/3/9/133989242/848005.pdfIn PDF document text
    • https://lenexemumuvag.weebly.com/uploads/1/3/1/4/131438583/xalojixelezed.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/tipos_de_comunicaciones_empresariales9yd73.pdfIn PDF document text
    • http://ru-payment.casa/snake_worm_crawl_zone_2020bj2ng.pdfIn PDF document text
    • https://zamigemunizi.weebly.com/uploads/1/3/4/3/134347724/8117053.pdfIn PDF document text
    • https://nimafomu.weebly.com/uploads/1/3/2/7/132710507/e2bac4479.pdfIn PDF document text
    • https://futinenapol.weebly.com/uploads/1/3/1/4/131438538/dizomove_riponoma.pdfIn PDF document text
    • http://lozelenirulotu.22web.org/the_hunger_games_2012_full_movie_free_download_in_hindi_480p.pdfIn PDF document text
    • https://vaxejoxumede.weebly.com/uploads/1/3/5/3/135346770/d33cf3a2ef1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_1fdd4e5cb6ce46a181896edd02be465a.pdf?index=trueIn PDF document text
    • http://desetezovadu.epizy.com/susavutuzubimesesokemamev.pdfIn PDF document text
    • https://cb38ef3f-1f2c-4622-8962-dca261660167.filesusr.com/ugd/3ae201_b7a7ee7769984c5fb89387f8aba198ff.pdf?index=trueIn PDF document text
    • https://14da0a27-f261-4d4b-8668-3a369f5c966d.filesusr.com/ugd/46429b_0d2eda9857094b1d885e745acbc41b8e.pdf?index=trueIn PDF document text
    • http://semogifogu.epizy.com/chamberlain_garage_door_opener_3_4_hp_whisper_belt_drive.pdfIn PDF document text
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_bfff7d9408ca40cb8a36ee0b49a896df.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_off0000ebda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDA 5492 bytes
SHA-256: 9341415aef848e872134bf3a7693bbe6b8ad2006586d210123b7004ae89db03f
font_01_sfnt_off0000fe64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE64 12168 bytes
SHA-256: 9521824cc4bb28a9635b608fbb9fd7e6827a4200d0812ab7f822959a56c950c3

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