Malicious PDF — malware analysis report

Static analysis result for SHA-256 d069203fd81a6713…

MALICIOUS

PDF

86.3 KB Created: 2021-07-28 08:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 8afdb164277b5b7dce9945a6ad6950c0 SHA-1: 13f71301928848cd6449343329a323ebae1e1e62 SHA-256: d069203fd81a6713a0338fc5332949348c45a62fd7dfef9596ab94bb84921292
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-severity PDF_RANDOM_URL_LINK and ML_NYX_PDF_MALICIOUS. It contains numerous links to external domains, many of which appear to be compromised CMS uploads or part of a link farm on disposable hosting. The ClamAV detection further confirms its malicious nature, identifying it as Pdf.Phishing.Trojan. No scripts were extracted, but the structure suggests it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d56cad413---gegodigiwewumovepodow.pdf In PDF document text
    • http://zovsh.com/Uploadfiles/files/77246953954.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b955f36d423---52409884055.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/86506510702.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/b029a9dhs8dm4loq0qdgiavkni/41049855698.pdfIn PDF document text
    • http://benefielddarrenfordhicksunited.com/clients/2/21/2186b72972973349411f8b90e6071e14/File/58464365898.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/2rjb7819582mqmjlgtfcclcoh7/92849605565.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/wumezo.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/vufiwojobexowarowided.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-4-29/20210429072102545341.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/ihsk4bn0ds5pimkpnsf67vht92/wataguxikuzatuzale.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/rovipasafega.pdfIn PDF document text
    • http://flightshop.jp/images/blog//file/ruses.pdfIn PDF document text
    • http://glenbrooksouth1970.com/clients/1/17/17fc1bd13d5538a69f39d58c869d2fc5/File/90526115190.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/lamozoxeduxitokunoxe.pdfIn PDF document text
    • http://polkovnik.su/upload/file/95178457107.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/5233f37adc110f4817902a6905147b32/lufajalofipudiwutid.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/xerivilenerozegikagavuw.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/257mn9e312shn04o9vqv3469k0/gilorup.pdfIn PDF document text
    • https://renetravel.ro/images/files/43909506563.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/19527911286.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f52fc5783---dewetomulifobotol.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/poguwizixamipomesujafano.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+do+i+download+tiktok+app+on+my+jio+phonePDF 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_off0000ec9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9B 17340 bytes
SHA-256: 53f20a8f72c3770a714a61351b85dc1d2f1088d248b94f74c26ab1b68a66986c
font_01_sfnt_off0001195f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195F 10804 bytes
SHA-256: acba1abe28fb51ebef3a25292c966009aa616359cf759cbc05b43725a9586f52
font_02_sfnt_off00013201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13201 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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