Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e6018b2427251cd…

MALICIOUS

PDF

141.3 KB Created: 2021-07-24 00:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 70da34d4f4fcaded3da09b5d3818a9cf SHA-1: dc568945f1d7e8c75e3b0575dabb43861b43e659 SHA-256: 3e6018b2427251cde373c73affef4f3df60124cddd54577b54fae4faa99fe9c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress upload storage, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, providing no further context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c46566ca069---bavofofi.pdf In PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/hcemki1mm9h6vtrd0ivqelvrgf/52068535359.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/62248835277.pdfIn PDF document text
    • http://akademibt.com/resimler/files/21251440339.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/926ab51dbbdbf1bc0dfb24dee47f1a4f/80372079594.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/2498901856.pdfIn PDF document text
    • http://grandbarnettfamily.com/clients/a/a0/a01b80d98e57c38af56892ab55e7d82f/File/gitabo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dabb81e03---robev.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160962a9d47bb2---gexinagafumufi.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608008ce9194b---rokejugenub.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/wefipogiwegugita.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/32845812518.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/39855744137.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160946c558511f---nokufatusadog.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/92150071556.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/dhgc5irih4680euas4g0lhe713/21328912331.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/panowapelulabimut.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/c104340f123725232046abee6d896945/fexago.pdfIn PDF document text
    • http://solee56.com/ckfinder/userfiles/files/15677894902.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/fab675e17ccfd5893bd91a81a6e85897/46733317741.pdfIn PDF document text
    • https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/pusapezimelewuzededom.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/zakilagavufobadobe.pdfIn PDF document text
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/94207493215.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=are+autopsy+reports+public+record+in+minnesotaPDF 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_off0001c754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C754 17724 bytes
SHA-256: d7cc736a72e0cb79e3ed1387d4261f9077f7c7060a3905530488c3f88eb22506
font_01_sfnt_off0001f514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F514 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00020d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20D2B 11008 bytes
SHA-256: fadad35c3a388ccbf1b8bba4f3e3f732da07fc73dda7b3e473460932afb449ec

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