Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4dd95579049f55e…

MALICIOUS

PDF

87.6 KB Created: 2021-02-14 00:22:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6e2844e63d2d97083908b714855d9b47 SHA-1: f19dc5a1f2c60401cb7499707587eb2099474ad9 SHA-256: b4dd95579049f55e86cefeb26fbae50311f6c0846ab75214f6329d5b489ef3cd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are associated with cracked software or game hacks, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wix?keyword=i+doser+cracked+apk PDF link annotation
    • http://oneitstore.pro/abcd_movie_all_video6ul7k.pdfIn PDF document text
    • http://xavukagidasali.iblogger.org/candy_crush_game_hack_apk_free.pdfIn PDF document text
    • http://mekatososa.iblogger.org/kindle_cloud_reader.pdfIn PDF document text
    • http://gulebamabixaku.22web.org/betking_app_for_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365583/normal_600556596059c.pdfIn PDF document text
    • http://tameeniraq.com/38804175435nellj.pdfIn PDF document text
    • https://roloruvibufezer.weebly.com/uploads/1/3/1/4/131410818/0ac879.pdfIn PDF document text
    • https://nozubewow.weebly.com/uploads/1/3/1/1/131164313/363f6da.pdfIn PDF document text
    • http://sarhello.online/17926437686w0l1s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lokujafeb.rf.gd/mopogavosakufixanajewi.pdfIn PDF document text
    • http://nulabede.epizy.com/kadoninaba.pdfIn PDF document text
    • http://zefixufedinokas.epizy.com/amplifier_hd_video_song_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/electric_guitar_beginner_buying_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/40944435947.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_off0000f8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CE 3652 bytes
SHA-256: 1b8805a39c64bad741c3a93ce8f4262cf59d4eb185e7cf9198e1aa9c2aa37927
font_01_sfnt_off000105df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DF 5036 bytes
SHA-256: 312ef8662f2f5a0ecae0cd24f9b1b116471066ea0caf60a2119689f6db7229d0
font_02_sfnt_off00011711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11711 10564 bytes
SHA-256: f194050194309534b5144bb6c69b18ea53192d681f7410924159982ba51311cd
font_03_sfnt_off00013b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B54 16168 bytes
SHA-256: dcc437beaabc532c244cb2402c7e187dabb6fccd34af89cd9e2270a2a4498d3d

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