Malicious PDF — malware analysis report

Static analysis result for SHA-256 c11d0d925d0187b7…

MALICIOUS

PDF

78.2 KB Created: 2021-10-02 13:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 25d0484c7d2d36c0c0d0ea39a44210d8 SHA-1: 46160d28917acb1e043023e9cb908f54793300fc SHA-256: c11d0d925d0187b71cf3f36843aa9c7b5f7608dab49b6f30444330e6f36cefd0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains, suggesting a link farm designed to distribute malicious content or phish for information. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs strongly suggest it's part of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://drtamerturan.com/file/jatojun.pdf In PDF document text
    • http://mapect.com/upload/fckeditor/file/81044237463.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/zoxajawolisow.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/45589303180.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/42793592836.pdfIn PDF document text
    • http://thsport.dk/userfiles/file/voxirilit.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16153d7bc57f0a---xitupogupexilirapufupufot.pdfIn PDF document text
    • https://losungversorger.com/product/file/55733140328.pdfIn PDF document text
    • https://warungmimpishio.com/contents/files/92450233627.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/jivijamugopevifegux.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/musopalu.pdfIn PDF document text
    • http://land89.com/ckupload/files/pakemukudatubinos.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/98311827846.pdfIn PDF document text
    • http://icaalliance.org/filespath/files/20210917210433.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202109/file/gevetojuz.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/ranuvatukugidexagoz.pdfIn PDF document text
    • https://servicenter.ro/ckfinder/userfiles/files/67226166662.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/benugukogozuzoxodusorosut.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/17250381336.pdfIn PDF document text
    • https://fajndoktor.cz/images/file/files/nugurakedadifudovi.pdfIn PDF document text
    • http://ejmk.com/ej/upload/files/215825211.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/17779512336.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/44464363779.pdfIn PDF document text
    • https://nepaltrekkinginhimalaya.com/assets/userfiles/files/35756484846.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=assassin%27s+creed+brotherhood+ps4+trophy+guidePDF 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_off0000bf28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF28 21472 bytes
SHA-256: a4c13072db7c97d9a8e9586db23d8d18b3e28cf5d0d9cb4afee6866fa4c2e91d
font_01_sfnt_off0000f75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F74 11192 bytes
SHA-256: 9446e8488b1c8531b9c40969872c2fc084f870e79d9e48261d5f36f5c11f8905

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