Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e28025d48b3c5cd…

MALICIOUS

PDF

77.7 KB Created: 2021-09-01 10:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 423966dc010aa4dffd9385dc9e949601 SHA-1: 2e4ec8841fdb2c917a422b7a3504ab0bfbee8bc0 SHA-256: 9e28025d48b3c5cdcf6c87916a40644f121e0f494e097147cab4383b69401d52
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was identified as malicious by ClamAV and a machine learning classifier. It contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to external, potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://peoplefineart.com/assets/202108/files/20210812081446135402.pdf In PDF document text
    • http://bezagsecurity.cz/userfiles/tuwobus.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/sivomig.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612c63ac9e801---82159450492.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/75814093869.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/namegejelos.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/b182a31052fbe004dfb159ca7f67b8fc/65326869408.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f87165e796---96377305591.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/xezobomusevune.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/65743317984.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e114bb956edce1c04e43641832e13167/64332647781.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608033f63cf1c---78770495118.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/taxuwisamenadurelux.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zudetawomagitelasemolol.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/rozelimopuwutit.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083dc0852ee4---22101844887.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/99679106174.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/87aafb71f5d29298cc1c72484db7799e/91866681881.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1609a99a7a6c95---xosexoxobajuwogetesata.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160921f572e4fa---35980277305.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/16619912003.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/61888604343.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/793543296.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=family+of+fabaceaePDF 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_off0000cf1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1E 16828 bytes
SHA-256: 30e86e4fc61c1c1e9d31c87b5fb7f8106af7d205e04fd2d6e82a107e2dbfd34d
font_01_sfnt_off0000faac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAC 10256 bytes
SHA-256: 3d295be069eca9d3bf86580003ad43b94e51603b6c511da164ae465cc770860e
font_02_sfnt_off000111bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1