Malicious PDF — malware analysis report

Static analysis result for SHA-256 709c01b7484ef689…

MALICIOUS

PDF

132.7 KB Created: 2021-06-29 08:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4cb107f84d1ac1284a1b4be30e363875 SHA-1: ff4524d6129bc7087f7029ee8a4df69a74767d76 SHA-256: 709c01b7484ef6891d117b7d39c69bfe66c7bfe831cfd29478003035622c9d63
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external resources, with several pointing to compromised WordPress upload directories. One link, http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/47857543509.pdf, is algorithmically generated and flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing or malware-hosting site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/3e88c6hklp5ms29ithq7mv03uq/ridezawuxegowuronojajem.pdf In PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/001l4r97uhtmvj03aecsgidcb1/21648416899.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/22581290423.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/fazovexizozapipatanid.pdfIn PDF document text
    • https://motacademy.it/file/wumaxi.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/jnvqafm8ue2up2m3l95or6v2it/70236909631.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/15540492306.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/86594a86e75f18d4b5ea5afa012364e5/14634937571.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/rixafukapipibegov.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160be02133c2b4---78152209771.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/7be35eb638ee534c290bfd3a4bad12da/38465151032.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/9d2f56ce7e40fab6e6f4d9a18402ccd2/99107631806.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a6b162ed1---gosonojewakosupari.pdfIn PDF document text
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/47857543509.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/8670b4ff69ec8e5ac3c660a8294160e9/godujo.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/24356065637.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/8abc6fff1a8a61e840386eb6592b4ecd/mupez.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/nilosebevapu.pdfIn PDF document text
    • https://brs.jo/userfiles/files/14720384423.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/60951185054.pdfIn PDF document text
    • https://ngonluathan.vn/images/ckeditor/files/verutewo.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cf124eb5375---58229365346.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/hivg3ek3tgvkfn483sj3u8cpt0/20323901066.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+long+does+a+red+light+violation+stay+on+your+recordPDF 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_off0001a0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001b8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8BB 11008 bytes
SHA-256: b3f092fc60e5e3a7f01424b0b126a16da20104949d5fd47e04db2bb23c046017
font_02_sfnt_off0001d218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D218 18632 bytes
SHA-256: 1f6ec4878aa45be85a43c7140298945fdc49e63d072806eae91674f130503991