Malicious PDF — malware analysis report

Static analysis result for SHA-256 44426e960b1a3634…

MALICIOUS

PDF

81.7 KB Created: 2021-09-15 23:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 660eb7aa282b0965ba81a843be9fd4c9 SHA-1: 66f112e5ae7100a9176252b93273781de8d2628f SHA-256: 44426e960b1a3634c3a830b5ff1fe3b70f618274b8a47d92f8cda1044bc73972
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, consistent with a link farm designed to obscure the final destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the PDF is intended to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://alice-immo.com/userfiles/file/7234939571.pdf In PDF document text
    • http://professional-tuner.at/uploaded/file/zewafan.pdfIn PDF document text
    • http://gugugroup.com/userfiles/pebija.pdfIn PDF document text
    • https://sunsetlearningcenter.com/userfiles/file/87727754282.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/jezijebape.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/tezijosugomikomenijo.pdfIn PDF document text
    • https://officialbacknumber.com/editor_up/36479378296.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/50182692248.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c9ab53dc6---9702955043.pdfIn PDF document text
    • http://chuanghuilaw.com/filespath/files/20210910105232.pdfIn PDF document text
    • http://giaydantuongphongkhach.net/images/news/file/pudom.pdfIn PDF document text
    • https://www.benkorner.nl/admin/library/ckfinder/userfiles/files/remixexuxosom.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/lelepileretodaremonupoki.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/nabafonoba.pdfIn PDF document text
    • http://www.heksan.com.pl/file/zazofe.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210904020753.pdfIn PDF document text
    • http://ternovykh.ru/content/file/36811907930.pdfIn PDF document text
    • http://air-con.ru/upload/files/53965608236.pdfIn PDF document text
    • http://akcco.com/userData/board/file/10099594760.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/firosepezalozizumelux.pdfIn PDF document text
    • http://na3.it/misc/file/sokejisugifikojelubenubuw.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202109080458283895.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/nurejevuduvovop.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/26783291608.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/dadexawapegasiletijometul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=is+it+possible+to+see+who+views+your+instagramPDF 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_off0000d833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD833 11156 bytes
SHA-256: 061bd6c36c9d6fd35e7d86b85c34e4efadd19364202b0c549af000ae537e20ce
font_01_sfnt_off0000f1f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A09 18248 bytes
SHA-256: 8b72cc55a5a195b353f4cf9bcb6f5f585db2230395036c91ebd50e9bc2b3913f

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