Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46cf96513f790d7…

MALICIOUS

PDF

80.7 KB Created: 2021-02-08 00:18:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 18ac8ae88ab9eddd6d5cfe3a5766ff58 SHA-1: 27d8f050982200a4cb1c326eff9db5679f6af5dd SHA-256: e46cf96513f790d755c958628b9714d9cee70534af3b0d155b1d709dde882491
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to the game 'Plague Inc.' The presence of multiple disposable domains and link farms further supports a malicious intent. No scripts were extracted, but the PDF structure itself facilitates redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=plague%20inc%20simian%20flu%20mega%20brutal%20guide In PDF document text
    • http://creditpm.com/jawabkom_the_detailed_answer_dailypqsk8.pdfIn PDF document text
    • http://bigno.space/xomipufolosopufoxkd07v.pdfIn PDF document text
    • http://theplafond.xyz/ielts_answer_sheetc2kb4.pdfIn PDF document text
    • http://talakam.space/human_life_international_ireland_facebookbyppj.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/gfIghNG/visufixez.pdfIn PDF document text
    • https://lejumapufa.weebly.com/uploads/1/3/4/6/134688193/revudagufifuzub_sizinumofexi_kadonivosudatel.pdfIn PDF document text
    • http://avtovishki-msk.ru/mevagivisesirodutokt4ko4.pdfIn PDF document text
    • http://gnoogle.site/21293330556d6yji.pdfIn PDF document text
    • http://ufenmac.com/activate_b2_student_s_book4ek2z.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/ijrLDCt/chicken_invaders_5_full_version_download_for_pc.pdfIn PDF document text
    • https://dafizigupiteg.weebly.com/uploads/1/3/4/4/134492389/3632589.pdfIn PDF document text
    • http://reduslimitalia-official.site/399912631293p1ea.pdfIn PDF document text
    • http://videohost.space/crush_the_castle_2_players_pack_not_doppler2yug3.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/gisujubolidine/tajitaboriponuxetupagi.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/detazujibalupun.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/wubuzijilapojubirewew.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9E 5484 bytes
SHA-256: 898b9a6b115c9a675674588fa8a580d685bc0ce707748fc33a17281c48e0f528
font_01_sfnt_off0001102d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102D 10952 bytes
SHA-256: f6b1911368c4dc045d1522b50f02bd306181de723d0e6be10c0ba17366e9988f

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