Malicious PDF — malware analysis report

Static analysis result for SHA-256 2988b96f2dd6b8a0…

MALICIOUS

PDF

71.7 KB Created: 2021-10-02 23:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f7a3340166f68780407e87071a028413 SHA-1: a38a0bd7ca83721273008e89a2ef21e76a61e219 SHA-256: 2988b96f2dd6b8a0d96ea341a889078339972ec2e65d1163cd2a95cb2e8e0ea7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised websites or disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://ketchas.ru/uplcv?utm_term=directions+to+philadelphia+airport+arrivals PDF link annotation
    • http://formpart.com/upload/ckfinder/files/tuvitudafukotepo.pdfIn PDF document text
    • http://logicamail.it/draft/media/jimijutux.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/woninedonodo.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16133a67cce541---32655678908.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/19135608934.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/84981659535.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/62694734257.pdfIn PDF document text
    • http://lifebeachvilla.com/uploads/image/files/64684019594.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/99104964574.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/71657781085.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/dasimadovubupa.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141d0b32bbce---74831328024.pdfIn PDF document text
    • http://citranco.com/users/files/vokatelevan.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f3e3a44ea0---28908967191.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16156f512b6980---vimopef.pdfIn PDF document text
    • http://halaljones.com/uploads/files/78474256489.pdfIn PDF document text
    • http://weldingplaza.com/files/file/9153643779.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/28092339366.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/xejetupa.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210925062436.pdfIn PDF document text
    • http://linklandhotels.com/upfile/editor/files/goluwaxizefewowil.pdfIn PDF document text
    • http://edituj.cz/res/file/47400449076.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/161504cb8c2c66---basamajuwowijizewiteme.pdfIn PDF document text
    • https://ev-owners.jp/userfiles/files/46525244708.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/49500033004.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog/file/zabodijefodoxake.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_off0000b457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB457 17404 bytes
SHA-256: 6593043ba24413fe4267edcd9460db2182a6697b4d6f06bc242388128632b227
font_01_sfnt_off0000e039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE039 10676 bytes
SHA-256: befb1686a0b35675314dfbee93cabd26fdb061b8909593dc6c59a1f08512d025
font_02_sfnt_off0000f8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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