Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fe55de080c4624…

MALICIOUS

PDF

78.9 KB Created: 2021-09-16 14:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b6f349e88b9a79d38832cd22d695ac18 SHA-1: 4e53da0b0c4b0add3e8c1c5481276743e226baae SHA-256: 60fe55de080c46249ac7d8ba0690e35b0d11ddd3fc1dd337371f5ddf582607a5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with many pointing to potentially malicious domains, and is flagged as a link farm. ClamAV detection and ML classification strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://halkapsikoloji.net/userfiles/file/befibarufinerasikedi.pdf In PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139c642bdb7f---96478342923.pdfIn PDF document text
    • https://hsse.hssanesteban.cl/files/xiwujifetir.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/denusugo.pdfIn PDF document text
    • http://gizmakina.com/depo/sayfaresim/file/famoj.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/94271274552.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/dibigewu.pdfIn PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/35465769353.pdfIn PDF document text
    • http://devison-matras.ru/upload/file/dusinovep.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210905_21EE4AE3124A7003.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/japomolenubalinuk.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/92039395004.pdfIn PDF document text
    • http://dominant.name/userfiles/file/jubowofevirawidumeraw.pdfIn PDF document text
    • http://martonelektro.hu/files/file/13968635721.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/berabexa.pdfIn PDF document text
    • https://music-group-store.com/upload/files/56947322679.pdfIn PDF document text
    • http://www.heksan.com.pl/file/kirot.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/75988583821.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/vatikuzufe.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16132465ec596a---51892962833.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/2644801389.pdfIn PDF document text
    • https://sunriseinnjasper.com/nbloom/fckuploads/file/mugarixugilebavuvawukax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=one+night+stand+with+a+billionaire+read+online+freePDF 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_off0000d0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C7 10884 bytes
SHA-256: 86c5fecb6da029ce6f85567f405d156d27da6a23c0ed3199a870a1b00a7d22c7
font_01_sfnt_off0000e9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D7 17192 bytes
SHA-256: 24a50fb73d5d4ee93a575406b1c0ced326e9b855c888473feac5c67a966029c9

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