Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32dd6f7a1ffe7c4…

MALICIOUS

PDF

75.2 KB Created: 2021-02-24 07:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d95a9f13d3d115695cb60b9bc8ad2f0f SHA-1: d2295df5fc73cbb896dda6a9a3c4d1d8fea08d8b SHA-256: b32dd6f7a1ffe7c4473550960de2c3acd803748e5add50ee954437de54e28cf2
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains and Weebly-hosted files, indicating a link farm or SEO abuse tactic. The document body, though heavily obfuscated, contains references to financial platforms, suggesting a lure for phishing or ad fraud. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to distributing further malicious content via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/aws?utm_term=which+is+better+webull+vs+robinhood PDF link annotation
    • https://sejesomizibiji.weebly.com/uploads/1/3/5/3/135346687/6534894.pdfIn PDF document text
    • http://filanion.online/mizoram_public_service_commission_answer_key_2018828bl.pdfIn PDF document text
    • http://50offshop.pro/facebook_android_desktop_ansicht038ky.pdfIn PDF document text
    • http://frukt.space/how_to_do_half-life_problemsl9tm2.pdfIn PDF document text
    • https://bijoxopibomer.weebly.com/uploads/1/3/4/3/134325560/ca5f6ae3b.pdfIn PDF document text
    • https://favaruzikab.weebly.com/uploads/1/3/4/8/134871436/9665423.pdfIn PDF document text
    • https://dubevatuw.weebly.com/uploads/1/3/0/9/130969539/pezabig.pdfIn PDF document text
    • http://grinallex.shop/55290493159ea3nh.pdfIn PDF document text
    • https://dopesitelubi.weebly.com/uploads/1/3/5/3/135307477/niragiziguxowubazoti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464715/normal_601e6d30d286e.pdfIn PDF document text
    • http://cleaner360.shop/android_studio_admob_banner_not_showingp9h8y.pdfIn PDF document text
    • http://wonder-ita.space/beyonce_songs_free_20159ec2a.pdfIn PDF document text
    • https://kagivosivozavex.weebly.com/uploads/1/3/4/7/134746508/bceb03879c2.pdfIn PDF document text
    • http://appless.space/doduxodewawobmzx1s.pdfIn PDF document text
    • https://tunupufimudodo.weebly.com/uploads/1/3/4/3/134324073/5ef83c4c28d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jenagubadopi/39569672308.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA93 5004 bytes
SHA-256: e385056114a6ed56bb46a7edd49b72e30e4624ef2c8760bb5a80ebb624d1600e
font_01_sfnt_off0000eb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9B 11228 bytes
SHA-256: 3c679cfdcad356bf1fa9908fd358034805a902d18be9e142d27463c254cb67b9
font_02_sfnt_off000111a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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