Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f38e80fc3c47d62…

MALICIOUS

PDF

81.0 KB Created: 2021-09-14 04:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d0ab4fad7ae806975f7726540083c34d SHA-1: a0eace82caf90affaba45f9d0d9e4e6cf3c1cb0b SHA-256: 9f38e80fc3c47d62121b4095da0f6a37a16a1ecc62d59606aa893528ada29287
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various domains, many of which are associated with link farms and potentially compromised content management systems. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://huntic.ru/uplcv?utm_term=iphone+facetime+with+android+phones PDF link annotation
    • https://tele-video.ru/upload/files/votegulisafaba.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/viwekife.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/15118254574.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/mipuvosevasujixezo.pdfIn PDF document text
    • https://norservis.info/files/files/lumut.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16308354361424747314.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/luwikaniririborupa.pdfIn PDF document text
    • http://varosom.hu/userfiles/files/41445628506.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/redarawuzalazive.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/wowididurugemubof.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/bodivolaxe.pdfIn PDF document text
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/24780076631.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bisajosegixapulaj.pdfIn PDF document text
    • https://kimansion.com/uploads/file/kimenewotonusag.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1631033270.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f70611f5b2---62211431878.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/jizebokoduxefuneme.pdfIn PDF document text
    • https://crownprolaw.com/userfiles/Proj_Name/files/10559368226.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/loxorekezoxeguvagiti.pdfIn PDF document text
    • http://sooam.com/files/fckeditor/file/374018661613f3bc30bb1c.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/95077120852.pdfIn PDF document text
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/lolopijibupisubiris.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/f6b70fbe59977643a329b0447376425b/65085360222.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16133308a444c2---95841065450.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/40523658438.pdfIn PDF document text
    • http://edilcfcostruzioni.com/userfiles/files/xutanax.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/wezemiduxasulafower.pdfIn PDF document text
    • 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_off0000d722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD722 17592 bytes
SHA-256: 33f8ab5f7b52d149c20f9a6540dd832afe38cfffb8ec654b44d0eb69d86d12e4
font_01_sfnt_off000104f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F3 10876 bytes
SHA-256: b3736951659e940fd6d214836083f9a2e64256840de6b76e7218c82f66b11ecd
font_02_sfnt_off00011df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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