Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee54c762680c27a0…

MALICIOUS

PDF

80.3 KB Created: 2021-03-24 18:35:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ebf5179c654252a1de8209b535e9fce1 SHA-1: 25e7440a75582ce00fb5bbcdd28e0619a2ab9eda SHA-256: ee54c762680c27a040275acf28a44e9002fd27b831282a75d54d8e0fe21bae8f
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. It contains numerous external links, suggesting it functions as a link farm to distribute malicious content or phish for information. The embedded content, though heavily obfuscated, appears to be related to SEO and link manipulation, likely to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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://maypoin.ru/award?keyword=hedonisme+di+malaysia+pdf PDF link annotation
    • https://kagoninu.weebly.com/uploads/1/3/1/4/131453226/fd4051779f724.pdfIn PDF document text
    • https://fifeguku.weebly.com/uploads/1/3/4/7/134733895/7461439.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/cuantos_cm_hay_en_un_metro_cubico.pdfIn PDF document text
    • https://zuxadozi.weebly.com/uploads/1/3/4/6/134662888/seronetinub.pdfIn PDF document text
    • https://xawawamofolapus.weebly.com/uploads/1/3/1/4/131436997/a80eaabbd3fa.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/maxi_cosi_pria_70_front_facing_installation.pdfIn PDF document text
    • http://lisovad.22web.org/vitaluredup.pdfIn PDF document text
    • http://noxugimeto.iblogger.org/26334024397.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/watajive/xeramobelonoroxalo.pdfIn PDF document text
    • http://luzojora.atwebpages.com/aprender_a_dibujar_anime_desde_cero.pdfIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_710932b61578434d8daac8c3351e5bea.pdf?index=trueIn PDF document text
    • http://kepipejesa.epizy.com/english_letters_handwriting_worksheets.pdfIn PDF document text
    • http://xixonuw.rf.gd/49462778408.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/guidepost_books_series.pdfIn PDF document text
    • http://revupeponalewuj.epizy.com/pathfinder_cleric_subdomains_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/2046421277.pdfIn PDF document text
    • http://muluwokixo.onlinewebshop.net/divegefewepikovetojus.pdfIn PDF document text
    • http://gurebuvijo.epizy.com/physical_development_in_early_childhood.pdfIn PDF document text
    • http://merivitewije.rf.gd/mesa_and_scarp_terrain_are_a_result_of_differential_erosion.pdfIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_5577479e61ca4580ba23107573fe6d02.pdf?index=trueIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_c45ee70a8a844213b580f4447c3e4527.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/formule_chimique_sulfate_d_aluminium.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/rainbird_5000_adjustment_screw.pdfIn PDF document text
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_2f5603a25908458aa1231f084e6e73b9.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_off0000fcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB7 5156 bytes
SHA-256: ba41bbb82588234317e00b9876a9794b209f34b99da81810f06457eaed159a67
font_01_sfnt_off00010e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E37 10620 bytes
SHA-256: 7a5e4681a88fffdb029b9a8493cbda89e7fac167abd7533c2aa67c413b231176

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