Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bdd5eb2462ea005…

MALICIOUS

PDF

72.0 KB Created: 2021-03-16 06:37:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 179fc4278df3fddd2ea615ad3e54a954 SHA-1: ee96505135f2ac0f1b17d1ccb0f35db98e23d7f0 SHA-256: 6bdd5eb2462ea005de302712f2f2c7d4111444a649971bbb482d12f61cd8143f
196 Risk Score

Malware Insights

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

This PDF file contains numerous links to external PDF files, many of which are hosted on suspicious domains. The PDF_SEO_LINK_FARM and PDF_SUSPICIOUS_LINK_LURE heuristics indicate a deliberate attempt to create a link farm and lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://ponafet.ru/wix?keyword=chapter+10+cell+growth+and+division+section+review+10-1+answers
    • https://lexezidelaxo.weebly.com/uploads/1/3/4/6/134605078/9139953.pdf
    • http://artrosil.xyz/tumukeqrx2o.pdf
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/voviw.pdf
    • https://nixozetite.weebly.com/uploads/1/3/0/8/130873825/wirepanu.pdf
    • http://securitycheckingbrowservkcom.xyz/53953798444i1zh2.pdf
    • https://derugipuze.weebly.com/uploads/1/3/0/8/130814861/vudabiliwalotumeb.pdf
    • http://flowerport.store/funny_short_stories_with_moral_lessonsva2os.pdf
    • http://zzzmmmmejjj.space/poninulipezuw1mebl.pdf
    • http://save50.pro/blank_world_map_continents_and_oceanscpjku.pdf
    • https://lawejuja.weebly.com/uploads/1/3/0/7/130740077/luzajasonoke.pdf
    • https://pidolanapeg.weebly.com/uploads/1/3/0/8/130813957/zenaduwutuso.pdf
    • https://kerijifulonuf.weebly.com/uploads/1/3/5/3/135328136/wepofidepuruxeveranu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pisedij/c_o_kancharapalem_movie_hd_free.pdf
    • https://s3.amazonaws.com/doxifuba/87481151517.pdf
    • https://s3.amazonaws.com/fipijife/4707614026.pdf
    • https://s3.amazonaws.com/kexamoxusinixu/afghanistan_a_modern_history.pdf
    • https://s3.amazonaws.com/xefejevife/91415025931.pdf
    • https://s3.amazonaws.com/rutufokedizon/brave_soul_coat_size_guide.pdf
    • https://09d56968-2ae9-412d-ad86-e67dc63a1c23.filesusr.com/ugd/e8b91f_be0f7d8b8fb049f382203e9abd63036b.pdf?index=true
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_e3675168868d4b6791c14ed867cfb5b0.pdf?index=true
    • https://s3.amazonaws.com/zategafozasiru/anna_telugu_movie_movierulz.pdf
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_0661e8f7aa3346e8a582109ddb6c3c43.pdf?index=true
    • https://s3.amazonaws.com/fupanabivote/aaa_logo_software_free_with_crack.pdf
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_df2cb7e9d3bc48b8ae70410c5e06b44a.pdf?index=true
    • https://s3.amazonaws.com/xuzed/lakshmi_narayana_ashtothram_in_telugu.pdf
    • https://1a899ca6-11bf-4464-971e-4bf0b885e765.filesusr.com/ugd/4ac3ff_253f2f7cc44840588bf931a40fe8e446.pdf?index=true
    • https://s3.amazonaws.com/wiwuxot/89549748785.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc9b.bin
2f3eb2268560d8aa71ce10d25b808bec7039df4b3c1c4cec85eddd967a9b427e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9B 5616 bytes
font_01_sfnt_off0000efc9.bin
758a35cd5a4cd88f7754ecaec31d261f1b2839d4563711eca87e2382c26f0a4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC9 9792 bytes

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