Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f287fdaac12111…

MALICIOUS

PDF

82.6 KB Created: 2021-09-20 10:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: b2f4135a08bd3949ca4b8a4e03b1bde8 SHA-1: 4a903151097cc8709c66bf00f2812bfc55381a5c SHA-256: 07f287fdaac12111a228fe27f151990556033643df53b0d62f0e54697f70e71a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm or SEO poisoning attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/731e6d819dc86fa72047630002973b6b/sotamevoxutilojel.pdf In PDF document text
    • http://srilakshmienterprises.net/uploads/5372104131.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gidusowonifadi.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/86727468092.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/71857594592.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16140871268cc4---risifulolos.pdfIn PDF document text
    • https://podgoricki-klub.me/userfiles/file/60996059852.pdfIn PDF document text
    • http://wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/64404737412.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9e6ecf04e---fufurozabiruwuwujupimej.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/61201744102.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210911174802.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/jesupativunedebewa.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/86368534123.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/vunoz.pdfIn PDF document text
    • https://rieker-consulting.eu/files/file/makopuzedipukinazekoz.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/tenebagogitizazev.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/80354031665.pdfIn PDF document text
    • http://darstin.com/userfiles/files/xifirevad.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/denijaredakolijaze.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16141a7d6b76c1---63794153056.pdfIn PDF document text
    • http://oasishs.com/uploads/files/20210907_154939.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/161404b97183b1---wopovebefidaludom.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/fuwewagab.pdfIn PDF document text
    • http://risorsaterra.it/userfiles/files/76781913787.pdfIn PDF document text
    • https://denimder.org/resimler/files/nuzojugisegakakopedube.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/24263619833.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/25379257154.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=jetpack+joyride+cheat+apkPDF 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_off0000db9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9B 18836 bytes
SHA-256: 46257d4b63b650e4a7f52e3d14e6f93033b48f18a9b3831e6ed21454eba53be4
font_01_sfnt_off00010c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C59 10620 bytes
SHA-256: b9e400733064e3e65c86e6314e2249360ddee3fc83b7eecd85e5bd04448b2f8f
font_02_sfnt_off000124cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1