Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba9bba55a237f4de…

MALICIOUS

PDF

80.7 KB Created: 2021-03-15 00:48:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6ea6ae934e0a6b2aa7094fa809b7fa51 SHA-1: a17e719ace829be4a9a2d74e1c44bcd32ab7955d SHA-256: ba9bba55a237f4deaab3fb6d6b5ad1d780af2969a04f9c579fcad7ea67759509
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document functions as a link farm, directing users to various external websites, one of which is associated with phishing. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the PDF structure itself is used to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 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://nipisod.ru/wix?keyword=garden+treasures+gazebo+netting PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468823/normal_6025b78e66b66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423428/normal_5fd1f929a70cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366382/normal_5ff186dc38a31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422133/normal_5fcdfecea987d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417222/normal_600e55ef0ae09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368768/normal_5ff7641a44416.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448539/normal_603a616310f49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407302/normal_603202730deb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417305/normal_601fde3b2596b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420924/normal_6018f0dcb9594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453103/normal_60365ff5c1568.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_b1c7cddf89f845c19eb8342d09554436.pdf?index=trueIn PDF document text
    • https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_f88037e4a6814c91a17721cabe19cc33.pdf?index=trueIn PDF document text
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_e5f7370848f74d72b743630a56aa2146.pdf?index=trueIn PDF document text
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_16d070094aff40d79aea6f01d8620cc3.pdf?index=trueIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_fcf34ffe0a0848c7aa8652eedb0966ba.pdf?index=trueIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_1a4e906a320d4d90bf6c2ea3b67a6a3c.pdf?index=trueIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_3a66ed1b19e6420e8c8885ace028344a.pdf?index=trueIn PDF document text
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_295d01b1d436465e9434a1c55bc136be.pdf?index=trueIn PDF document text
    • https://f414df59-d0c5-412c-8277-160bd92acc6e.filesusr.com/ugd/055bb3_77ccdb8ca7ff407395c1a59eb70ead21.pdf?index=trueIn PDF document text
    • https://61249681-e2d1-4375-841a-b3723294d79c.filesusr.com/ugd/3d514e_3845e1f456db4d7cab9a3cc52a629709.pdf?index=trueIn PDF document text
    • https://882e4f53-a7e1-4d4a-89e8-a6e6d9f9b805.filesusr.com/ugd/9a13d2_bcd0906580364af59ccc2c41efb8b0cf.pdf?index=trueIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_00a13d84011e45cc9761019976f0cdbc.pdf?index=trueIn 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_off0000ff11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF11 5180 bytes
SHA-256: ce383b6118ae7474f8ce32a228994d070bfb98a65adb3334afe1cb1ad42a65b0
font_01_sfnt_off000110c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C4 10788 bytes
SHA-256: 53b36063785ac5909c1ca2235e1bf96a73d91bb5b39af09c68e285c3b9e28ec1

Open this report in the interactive analyzer, or submit your own file for analysis.