Malicious PDF — malware analysis report

Static analysis result for SHA-256 e761460a3640c08c…

MALICIOUS

PDF

79.4 KB Created: 2021-10-09 05:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7c350777a99a0897bc9e575001f1fac7 SHA-1: 321eaa697c62d935a191cca801c1779d78af460e SHA-256: e761460a3640c08c34d5499e7133469417f1c880f7e19a7dc81320a378939b08
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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://onecre.com/images/content/files/sebagoz.pdf In PDF document text
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/fitoradajetegeg.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/27cc63a4f0873028df0cc8de68e74c96/52817769219.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/82863049407.pdfIn PDF document text
    • http://dworbieland.pl/userfiles/file/75429565105.pdfIn PDF document text
    • http://autodilygood.cz/files/file/zefogotabiz.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/retogag.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/59989701351.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/pemuwokoloparugo.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/84089119017.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/fuviraxuweri.pdfIn PDF document text
    • https://truonggiangcompany.com/userfiles/file/rugasifixurude.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/19774177370.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/jitiluxumajozaro.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/rotoxivojalumoxosurewa.pdfIn PDF document text
    • http://eko-uklid.com/files/file/18069714313.pdfIn PDF document text
    • http://rund-sro.cz/UserFiles/File/75210108817.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/18385846665.pdfIn PDF document text
    • https://gencshow.com/upload/ckfinder/files/41250882189.pdfIn PDF document text
    • http://hidropro.hu/upload/18854795039.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/muvobegotedeginobifuru.pdfIn PDF document text
    • https://mklaassen.nl/images/file/41086789605.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/fewezoxekivizigani.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/84801619202.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=extradition+act+2003PDF link annotation
    • 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://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_off0000d39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39B 17196 bytes
SHA-256: 0cc89a7148edaaa8517884b6f6299aea39d34d9c5c7c457e72233deaaa743086
font_01_sfnt_off00010009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10009 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11820 10516 bytes
SHA-256: 499ad6132603ea4f41c97d001e4e9ec69705376bb3c79878ade460d132f5de5c

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