Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe89d972b97a84c…

MALICIOUS

PDF

80.6 KB Created: 2021-08-29 11:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9ecac568da174ed10726c6871bb43770 SHA-1: 9d90c5347f321e0d043c250cdc2aea4d74ce99fa SHA-256: bbe89d972b97a84c760e824666520948ba5011e5e8bd238753f9a31b45abaf88
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress upload directories and other disposable hosting sites, indicating a link farm or SEO poisoning attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811b953187a---murikovalomatelasiwativiw.pdf In PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/dososipekojiropa.pdfIn PDF document text
    • http://sunpix.ru/img/lib/file/bigaxojebuxivukokunemadew.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c737b8971bd---xupinenefugidizelutel.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16096784a90041---jozeravida.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/c9fa398f141f23a90ea3c3f27386e7ed/zogufavinuv.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/rogolaxajiwodonevo.pdfIn PDF document text
    • http://synhbio.com/upload/files/tedonofodopirakesetewixo.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210619090729.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/dudatalakopawi.pdfIn PDF document text
    • https://axlthailand.com/imagexx/files/8532994380.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7efb3807c---gasorudopemusixozogesupa.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4dd45d22a---42972180471.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/2863034510.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/84c5d7ebc0f518f86b61477be282757a/17809121689.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160dbdefa61374---77659965857.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/viragapagonivuferize.pdfIn PDF document text
    • http://tucholainfo.pl/userfiles/file/81790403295.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/20264495043.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d84320965---xexomafiwejadej.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/8906411550.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/12056266117.pdfIn PDF document text
    • http://decaiyun.com/upload/file/210803093348764829lx6368ne1l16.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=cleo+mods+for+gta+sa+pc+free+downloadPDF 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_off0000d4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED06 10988 bytes
SHA-256: c32c16ee7ff48fc2421710aa1e222e60a8ba549adc409af69087b41291994328
font_02_sfnt_off00010675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10675 17840 bytes
SHA-256: ae8c843f52853ffb31f67ffd4d2ee832471b13e7bf4e6df462893cc347dcb807