Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebaa1ae97c193e64…

MALICIOUS

PDF

80.0 KB Created: 2021-01-20 10:12:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4af22832b6caeaad21ea540706912a5f SHA-1: 1dd169343356d948ca114b2223381a0454d452b9 SHA-256: ebaa1ae97c193e64555b9c1272bbec85ee86b70b9812a4d540234efd88447108
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a 'Genesis mountain bike', suggesting a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/123?utm_term=genesis+mountain+bike In PDF document text
    • https://cdn.sqhk.co/jenotonolo/bjdeggD/zarizako.pdfIn PDF document text
    • http://rakajipof.22web.org/dexunafebirebasi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386620/normal_5fc8c1d42dee5.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/hbigehg/87493584473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f88874d302ec.pdfIn PDF document text
    • http://getegenufiduso.66ghz.com/bikini_bottom_genetics_incomplete_dominance_worksheet_key.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368244/normal_5fefe6aee92d3.pdfIn PDF document text
    • https://cdn.sqhk.co/gazejuruni/Zagdija/stories_love_and_choices_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/midipumep/gi0biNn/fast_and_furious_spy_racers_happy_meal_toys.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421062/normal_5fe56b27019bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fevepapowiwed.epizy.com/animations_movies_2018.pdfIn PDF document text
    • http://ditufadupogeju.epizy.com/163056119.pdfIn PDF document text
    • http://mogerokefo.epizy.com/ligavuvezufawiwufugu.pdfIn PDF document text
    • http://mizixizomafupez.epizy.com/chrome_link_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/setool_lgtool_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/zubigexovimab.pdfIn PDF document text
    • http://lilivuxaja.rf.gd/round_one_youngblood_brass_band_sheet_music.pdfIn PDF document text
    • http://jenesigafepi.epizy.com/avancemos_1_cuaderno_answers.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_off0000fe8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8F 4936 bytes
SHA-256: 36bcca61dd48ac40638ac9e0475bbd6a49c0c33e6e483605b0bd7e312dce03e7
font_01_sfnt_off00010f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4F 10400 bytes
SHA-256: 56ac2df5b1986c385df1e247e691ad701cc66c7a875e610b3475ab3900ee1668

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