Malicious PDF — malware analysis report

Static analysis result for SHA-256 eddb2c372f7ed1da…

MALICIOUS

PDF

89.9 KB Created: 2021-06-27 07:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5d54d9a86754a377d1ecab809ef465f5 SHA-1: ef12ac9185334567e7f778a03dac20a0c1c96f2f SHA-256: eddb2c372f7ed1dac5fb560293e628f7dd6094948134868ba3d1430fdeae8d7b
156 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to lure users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://catamma.ru/uplcv?utm_term=horror+movies+with+nudity PDF link annotation
    • https://feldmann-spedition.de/pics/userfiles/file/sezozavava.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1b69cb39c---39295649918.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/1386482203d87148c206e57296e27a88/soruwesewokederofudofafaw.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/potugavorivago.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/87730307186.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16209506047817.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/061d8782a57c867bf7460cfcea29fa4c/wuzenefenarobu.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/691566005.pdfIn PDF document text
    • https://nutricount.cz/UserFiles/File/37473015100.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/mduuhcqfdsci1ljkksp16fpflt/16485239124.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926e6182348---luzisovokodak.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcc1e83cec---lutigidujumamodatirujido.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/5347619dbe889261651e91004cf35ec4/11886355672.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/80772477509.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072246203cfb---mutusevapoz.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/0uspm0bookec7ronu0m09a65ne/sewefakomigejeluzexolu.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/41083815167.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdbb1c5d33---nipad.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/jenafowugimimuwolopip.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/05/files/210531021131.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/66314065705.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/99e335da1b2102bc469a89ccbb7ed9b0/71700622887.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083b6ffd3ac3---lexal.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/kudodobamavagowivadar.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/c5f7o91pla788f7j8ao04ho95m/wafukanut.pdfIn PDF document text
    • 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_off0000fd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD10 17316 bytes
SHA-256: 01c42e1c1f984d8fea4dfb83b75a9c96e58ba3b6b2a6679e5598c0d9d9f8c25c
font_01_sfnt_off000129f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F3 10660 bytes
SHA-256: ab720c09b7f42fcef7be3abcab2272ed30a76d604f25bcbe060c0395663df1e4
font_02_sfnt_off0001423e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1423E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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