Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b27e927411a611a…

MALICIOUS

PDF

98.2 KB Created: 2021-06-28 23:35:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 96e3a464f748a0d01fda5a5370cd64ee SHA-1: 95002ead1a573872f895e17dfb9f1cf65fb2f42b SHA-256: 9b27e927411a611abe500eb01ffcbb1522dec9f4a517ab59d7a2f55afe7a03d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the structure and URL patterns are indicative of a malicious PDF designed to lure users to external, compromised resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/17a5a42e1e14e4f001dc8457eb0c5841/98608697388.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/f7b0a8e714fe0e4e6ae39e70b1b83e2b/wisutuzagilitosekirufivu.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a138a5e5f---95816714324.pdf
    • https://ikima.fr/uploads/file/xasewamasorubuse.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/95a713289dce15d5ffedbb3d804266e7/76920741899.pdf
    • https://porterbrothersltd.com/app/webroot/uploads/78244998557.pdf
    • http://viprealestatebrokers.com/userfiles/files/74433881772.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/1f71099c22fdb628ef74e86a3f8641f7/15292505483.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/54940372bd8f16ea8e333dc4db9d967d/50418782203.pdf
    • http://eurekaelearning.com/upload/news/file/60727833095.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c94b98169c6---sojidugewekavezamidira.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608145dc6c366---balodogivalofozij.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/aabe6c7da092d9cd29c3c9fd57835aeb/zajawulipalur.pdf
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607787349f031---lavebeledipajezorupirufe.pdf
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/1lav1p9tjkc8qp2kbvmgnvaj9s/belope.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/7vh5bf7t94imuif1c2dmk2n963/59688901747.pdf
    • https://beauty-full.ru/uploads/files/kifewirisimupalofolusi.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609665e11ffdc---xizinigifewutewagukubave.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160861fcaad195---92815701456.pdf
    • http://urbanconstructions.org/images/uploadedimages/file/fugudokar.pdf
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/75eeb3cb6857cd8605da73b7f6df52c4/95052793070.pdf
    • https://gamaconsultores.cl/upload/file/12324589596.pdf
    • http://abacusnancy.com/userfiles/file/tosoxudu.pdf
    • http://goldnumber.info/userfiles/file/69948456656.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=sat+sample+essay+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e66.bin
310b0494d6fc1710b49f1d604d44864bc276de91cc3dd4c36ddd00afca7ead71
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E66 10476 bytes
font_01_sfnt_off0001363e.bin
6210dec1db3a7d29cad952f6e105068a9e880d26fa30fc92d715b8309e7e2362
pdf-font-stream PDF embedded font (sfnt) at offset 0x1363E 17432 bytes
font_02_sfnt_off000163d4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x163D4 16792 bytes