Malicious PDF — malware analysis report

Static analysis result for SHA-256 415768ddd7d95f8a…

MALICIOUS

PDF

82.4 KB Created: 2021-09-08 02:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0332e84a762c3865a86ea3daa66376ac SHA-1: e715dc7ebb5664e8963025cf61e7f70f772055b8 SHA-256: 415768ddd7d95f8ab222b775422c8d05ff3310039470cd0559234e9d8879e574
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file 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 malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a295550ba---magonosa.pdf In PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebae896f93---92897633829.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/12635948275.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/5107842555.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/runedepej.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/2740e65e7e85ca26bd1a8fccea6e19c1/radapaligozeriwutininusom.pdfIn PDF document text
    • http://kyochonbuenapark.iorderfoods.com/uploads/files/dufolividarufaxenaragudag.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6223fbe237---ruzigegewemovili.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d403e18a3b1---98490830484.pdfIn PDF document text
    • https://austarpharma.com/upload/files/85569238973.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/88918582535.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607866aa8575c---kopaximukufabuf.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/ift1tss5vg73nl42bgf26pvaon/zekiritesiwonavos.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8efbe70941---lapija.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/tapuporada.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/1602622636.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160de743eb0eee---jasokapodofazurudiwusese.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/liviviroliniwebixikibewo.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/rinufo.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/detano.pdfIn PDF document text
    • http://interstroy96.ru/uploads/files/zegumofebodejaren.pdfIn PDF document text
    • http://3q1p.com/upload/file/210624112725656251458g9js19rw4.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9eede5369---42039929425.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=free+printable+preschool+kindergarten+worksheetsPDF 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_off0000dd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD60 17884 bytes
SHA-256: bb4a75c9c9e8161cc3c8d82e5aa3beffb74ba049295675ff2a0e69cc3e1040cf
font_01_sfnt_off00010abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABB 11088 bytes
SHA-256: 669755dc38be55da1eb9b29ee041ea74b18455e995cd48b64eaa1891abbd5d39
font_02_sfnt_off0001241f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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