Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3c0b5541e8e3541…

MALICIOUS

PDF

75.4 KB Created: 2021-09-24 12:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 038be4dac1bbcd4a6531b90f07ad3913 SHA-1: ac059e738f068370c87dc1f1e825cb09cb7a0251 SHA-256: e3c0b5541e8e35418c791bf0a6e563ffd240534517e2f0a2391729200295af7f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, with a high heuristic score for being a link farm on disposable hosting. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it is designed to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://francescasciortino.it/userfiles/files/84879666469.pdf In PDF document text
    • http://classicalgardenornaments.com/uplds/file/molufowokazimaxeza.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/70508360644.pdfIn PDF document text
    • http://sipsak.nl/userfiles/file/85686140524.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/99552226818.pdfIn PDF document text
    • https://crbz.ru/userfiles/file/37104872423.pdfIn PDF document text
    • http://heimundsicherheit.de/userfiles/file/50306569380.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/43821241513.pdfIn PDF document text
    • http://richardchong.com/userfiles/files/42412987624.pdfIn PDF document text
    • https://altaitur.com/ckfinder/userfiles/files/mepevegowisebimimoxod.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/xifusekenodexorovi.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/gepexikonoxadugezava.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/widuvagatiwexidas.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/wamosefigelifebibisure.pdfIn PDF document text
    • https://lp-tracking.com/userfiles/file/sedanine.pdfIn PDF document text
    • https://harmony-lazienka.pl/Upload/file/tobidifoxawikedetujuri.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/govow.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/nesosanijupeduzuli.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/waleporisatak.pdfIn PDF document text
    • https://heureka-cz.eu/files/99049231612.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/91034250689.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/rupod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=les+jeux+sont+faits+english+pdfPDF 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_off0000bac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D3 19860 bytes
SHA-256: 2aea58b149e747baef5629707e0b6f78d6625ec1d440336098a2b4649d2d6be1
font_02_sfnt_off000106be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BE 10964 bytes
SHA-256: adc3d7021a156df80b1ad0d793b25260199b0d11fff468cdb1cda2650b907270

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