Malicious PDF — malware analysis report

Static analysis result for SHA-256 2009a669e9d652e5…

MALICIOUS

PDF

87.2 KB Created: 2021-09-19 07:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4e780b2e933915e90fa972284cd7d003 SHA-1: 10aa2c1ec69231a99708f6c935eb4b8b876988cb SHA-256: 2009a669e9d652e5d5e94f2b5190d66be327f92887c7435001c1cbf6559fd153
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://carlojans.com/cms/file/94328222846.pdf In PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/32c231669ff3ee98fd4eb01a2ad60198/91060609206.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/betogo.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/bupurigeni.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/wogijafab.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210913_0680BAC06EEBBE9B.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/piponofofavidogix.pdfIn PDF document text
    • https://mentormedya.com/files/41599039147.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/okh72oeclt98ptg2fn7pl4qr87/66463527714.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613610d7f1c17---xorudewovejapituwi.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1631256468.pdfIn PDF document text
    • http://www.jobibon.com/admin/userfiles/file/gidoliwujidexuguzeran.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161303ea5cc38f---77338910333.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/72043147495.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/jidefururewubotinotazuw.pdfIn PDF document text
    • https://serihosting.com/calisma2/files/uploads/nusuk.pdfIn PDF document text
    • http://delve-cr.com/uploads/67349622215.pdfIn PDF document text
    • http://bibikid.ru/upload/romorolu.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/8bee4c8558569808d8bd021b73b659ee/zelofaxegovetu.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/b02v8msgeaham3gnakfqgqtgq2/40699128834.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/39480299927.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/83035463627.pdfIn PDF document text
    • http://vilniausgreziniai.lt/userfiles/file/93350080220.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/vividozuzivupajotezubivor.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/bibotuxunidudagu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=downgrade+phone+softwarePDF 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_off0000ee17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001062e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062E 10728 bytes
SHA-256: 331aa81980ea104b06110b74df032e956ae14422c69551095605e7a66a7b5158
font_02_sfnt_off00011ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA6 18724 bytes
SHA-256: a95c5b7220daf546d9714e264fd50b216d4f8bb7ba5365b064c3613af69705bc