Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e4cdefd62080c3…

MALICIOUS

PDF

84.5 KB Created: 2021-07-03 04:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ebecc3a382eb5146d593013001d88f9f SHA-1: 01e4c9440ac8a9c2c7e5dcc9cb384cf1789dd89d SHA-256: 27e4cdefd62080c369bf98fa81c30501c91bb456b739b0eefc32055245410e30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to lure users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://queure.ru/uplcv?utm_term=dehydration+in+babies+1+year+old PDF link annotation
    • http://picassogift.com/Uploadfiles/files/buziwawupaxu.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/f2a9f287953c8256062154bc4884d2ed/bafopinadoleso.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/61622336392.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/5e0i7jn0bvjj1va90ktfcgrfk4/ralakifepopiruwub.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/zazulirupipakodepupetit.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/kinipiwiwawogo.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/69584606416.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/boxajuri.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c954d3d8c---fuwojaxetixenifaneguninu.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/73153230043.pdfIn PDF document text
    • https://menu2uplus.com/images/file/2460379637.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da5b9cf37c---xodujal.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1606f363fb7958---43522961710.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/60103251448.pdfIn PDF document text
    • http://whalesart.com/uploadfile/file///2021052507161092.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/89545695025.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a287df9fe---87746465294.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/fifolo.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e2b8c3e45---zilefakuzenedasujewawax.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/lkcnb0n1gsguh94lgh6ss8ah81/xedaruvadusabofojag.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/wirogivizolitikipugoj.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/tafojatatileja.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/65621375228.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_off0000ea1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001022e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022E 16264 bytes
SHA-256: 2eac18f1c0d0e6c5c7381ce08358ee5815871e8029f8c14dc1d1630c7e81e7a6
font_02_sfnt_off00012c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C56 10652 bytes
SHA-256: c868dc8b2d64c82de1df0571a7153d8cf5cebfcef0bb178372cf1dbca0b39693

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