Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07a011aa1b6609e…

MALICIOUS

PDF

81.7 KB Created: 2021-09-08 02:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 73ecce40c28509f589b842e185ecda30 SHA-1: 49229cdd4a724c03b31e4f3a2c68d80161ced2f0 SHA-256: d07a011aa1b6609ee1e28a4285a555938c5873f039c5561e6b7d1d96e13552ec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=wellness+recovery+action+plan+template+pdf PDF link annotation
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102fa6d59118---supowodejak.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/evt8a40kq447ctuk1dbn7sjvcq/refejizewix.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/161049a131c153---56639778458.pdfIn PDF document text
    • http://fitviewer.de/files/file/29557967884.pdfIn PDF document text
    • http://levant-tekstil.com/other_files/File/9552927041.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/65207840639.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137e17199890---pobokujuga.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/jibukodutevufitefadotif.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/luwatuvu.pdfIn PDF document text
    • https://ewt.cz/res/file/13385699996.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/4ccf2d56251666d0723866e59c1f2db4/42871438083.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/1190836709.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/09/04/62565800869.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/xalusokonavokafozik.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/83820455548.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/rolifitozo.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcf09bdf00---gipegiwi.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16070ab9c1eca3---16610457480.pdfIn PDF document text
    • https://nodka.eu/ckeditor/ckfinder/userfiles/files/24083005887.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/d328aa1f9aaf5bcc720bd23511579687/83319061476.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/13362395334.pdfIn PDF document text
    • https://whereestar.com/marinarubicon/admin/file/dered.pdfIn PDF document text
    • https://lemonsport.sk/upload/file/44884885957.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161235bdfa141d---wefukofi.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/puwijosupeno.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_off0000db12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB12 17184 bytes
SHA-256: 685de910f01575cfe8c9594875966dd9d9bc0644181ec4718b37f8edc468dcb0
font_01_sfnt_off00010759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10759 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F70 10952 bytes
SHA-256: 780f8909a32fb6a8cf51ed5ee6c99c9f3d6dbe3ea68c5f22954560b018e73c21

Open this report in the interactive analyzer, or submit your own file for analysis.