Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82882e4c3820032…

MALICIOUS

PDF

92.0 KB Created: 2021-03-19 08:30:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: da5b436b5b29ef33a1cf87befb729665 SHA-1: 21867557bba8ef4d1783fec03d3310cb9d3f2b1b SHA-256: e82882e4c3820032b3b9ab08c89708ac7ed34a96dbd97e2e1338612cd933c8f6
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically pointing to a domain designed to appear as a search result for 'javascript functional programming pdf'. This suggests a phishing or social engineering attack aimed at redirecting users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://baarspo.ru/award?keyword=javascript+functional+programming+pdf PDF link annotation
    • http://jinevul.mygamesonline.org/58080248045.pdfIn PDF document text
    • http://jusapp.club/wixubis5qxdz.pdfIn PDF document text
    • http://greyfruit.space/chakras_significado5ab9o.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/14485115393.pdfIn PDF document text
    • http://musc-media.xyz/hp_spectre_motherboard_replacementgm4l2.pdfIn PDF document text
    • http://kanshoper.site/2436243777rbyfg.pdfIn PDF document text
    • http://ruxuzosok.mywebcommunity.org/legakodi.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/fezikamajesakaxoli.pdfIn PDF document text
    • http://latuha.com/activador_office_2016_professional_pluse4ceq.pdfIn PDF document text
    • http://halfraire.xyz/lebasifenanemuzog3tdtw.pdfIn PDF document text
    • http://parrrtner.xyz/up_rto_vehicle_information_detailxe8ni.pdfIn PDF document text
    • http://yesnutural.space/c_programming_language_the_ultimate_beginners_guide7ecvm.pdfIn PDF document text
    • http://top-shop-store.website/mivupolidopp1880.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_d8ee9ec4ecb243b38da28d9d1ea53250.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/how_to_transfer_mini_dv_without_camcorder.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/51338108461.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/smithing_level_guide_osrs.pdfIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_2c7745d870a5468a83d755e7a2b2fb77.pdf?index=trueIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_b2ab7a262dfa4934a284d041d7035105.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c0a2721-3059-421b-b044-6a1f0984a1c2/bipopawakujat.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/gimilufubuvaxuxix.pdfIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_4610d2a45c8547a4a2d6be5d06dcb0f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/671ddd3f-c06c-49eb-bdea-e71be432e389/taotao_atv_carburetor_problems.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EE 5524 bytes
SHA-256: eed1ef8410bd3ae3dfb1b89856425ac815d611ce85c0c09c780bd581b16b7d04
font_01_sfnt_off000114ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AB 2936 bytes
SHA-256: 7da65b47cda03077f4844f884028808bf53c38039b6118eb14e8b7ab1d251c7c
font_02_sfnt_off00012113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12113 12072 bytes
SHA-256: e8fa1dc61d7bfe676aba6a21a81178ee297c3ea57d6b323bfb7a918ef71276cb
font_03_sfnt_off00014a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A82 16696 bytes
SHA-256: 8df077f9200e9bb8ac19041728e8e2815d4dbc61bc468e7da1163171ac5878bd