Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d0611414d04f2fc…

MALICIOUS

PDF

78.9 KB Created: 2021-04-15 08:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ab17657cf76959083fe97c99b1160c21 SHA-1: 0eb5efe32f94ee96cab14f798e0e69aa74c141ef SHA-256: 4d0611414d04f2fc1347f3dd8189ef28bd0d4f63e44e2970772c720808fd6654
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and is flagged by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, appears to be a lure related to pairing a remote receiver, directing users to external URLs for further interaction. No scripts were extracted, but the presence of multiple suspicious URLs suggests a phishing or malware distribution attempt.

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://xezojetit.ru/strik?utm_term=how+to+pair+dish+hopper+remote+to+receiver PDF link annotation
    • https://cdn.sqhk.co/favosejo/hdOjbuu/detective_story_books_in_bengali.pdfIn PDF document text
    • https://cdn.sqhk.co/jifegusewe/aHNijib/sasobo.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/jhLjXi1/shark_simulator_beach_killer.pdfIn PDF document text
    • https://nanupubixo.weebly.com/uploads/1/3/0/9/130969545/1d5213b26549.pdfIn PDF document text
    • https://cdn.sqhk.co/tejosepu/biboBha/baleadas_recipe_with_eggs.pdfIn PDF document text
    • http://contact-git.top/photography_changes_everything_marvin_heiferman6rety.pdfIn PDF document text
    • https://wekosidofanepa.weebly.com/uploads/1/3/2/6/132696212/0402a8ddba80.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://kind-insta.site/3714703755nwj5i.pdfIn PDF document text
    • https://zadopelujon.weebly.com/uploads/1/3/4/8/134884154/5ba67a8cfd.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/9ifiehb/puxorobovowixejugubo.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/Tiggxji/fatiterugukejeruzaloxaja.pdfIn PDF document text
    • https://samovibemajus.weebly.com/uploads/1/3/4/5/134597991/wafopuzoxiju_botodexuwutez_xawekekesob.pdfIn PDF document text
    • https://balabirow.weebly.com/uploads/1/3/4/6/134690292/tuzukovapatax.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/nerugiraxura/44921223465.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/8856905732.pdfIn PDF document text
    • https://44f68060-d5e3-4d58-b4e7-e3760392f352.filesusr.com/ugd/49488e_7d738d69a9294eb8b357390f485f5031.pdf?index=trueIn PDF document text
    • https://b3dfd9c9-1030-471f-a26d-814ea73dbccc.filesusr.com/ugd/d97afa_5c290a2d00cf4158982a400fdf17075c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisiku/gejadadoniz.pdfIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_f8866c6f1c304bc69162f72350f555d1.pdf?index=trueIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_0bb202bfde0e4058afa417f3c1c7149f.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDC 5396 bytes
SHA-256: f4709e59f8556a837bf539338856a437a38c704860e30ec1d1aabb6f4e5b4d3a
font_01_sfnt_off0000f120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF120 11352 bytes
SHA-256: 622dbc0944f857fd16041bd9e59893cedc57af7b4fa291224620d6ceb6bdceff
font_02_sfnt_off00011823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11823 16148 bytes
SHA-256: 57cc76c5d0821ee651784b05a7a7e6780fe5113b8f4359c05205522d11f96342

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