Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e93bd295f8c2713…

MALICIOUS

PDF

87.7 KB Created: 2021-07-01 19:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8bf4130fd9e198e886bb5777cc409208 SHA-1: ec0cb74303eb94fa16b5c5c1c6f58765369e79bc SHA-256: 0e93bd295f8c271395d6c5d99d74d4ad796c21b650c3fab98b747de2a002a520
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple distinct hosts, many of which are identified as compromised WordPress uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The file's structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/55debbda6ea2ce9024f414a7948cef5b/9372596231.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/9skm85fb3sutuni42njmi9c6ja/69073443291.pdf
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/98432892116.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a687917f912---95491174620.pdf
    • http://polskienarty.pl/data/aktualnosci_imgs/file/mefisubikegorolanagom.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d8be08ded---gifofanat.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/d4ok320lqnv3mjdvipds5rcu1s/61884440617.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab8c350a87---vuluko.pdf
    • http://myxroad.com/upload/userfiles/file///nefixerukinipi.pdf
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/zererawuw.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b409d1ce979---5294666330.pdf
    • http://eurolocal.info/sites/default/files/images/file/92264690910.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/c0a199824b2001d5808ba1468ca1451b/75381389684.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/f7b3ba087af2b2f82fd871a3d687b204/800965826.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609111a8613ab---95395600003.pdf
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/192228486103.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f7f63464f---65616162126.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16076869af4149---99440840692.pdf
    • http://dinskayarealty.ru/media/file/51116414341.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a11b760442a---lavuleduxikisepelize.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/tmjsev8kb95ce1v3fha3qohvt2/kevipibu.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb0cf9444e0---mipot.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=fergie+and+will+i+am
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef62.bin
6e3dc7911cd3c9af066100aeca9c7e4126a6306b490ce44a3075c8d81135d47d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF62 20244 bytes
font_01_sfnt_off00012191.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12191 16792 bytes
font_02_sfnt_off000139a8.bin
f3af627d8e5b7c3e283079c50725effa89e74852b5b4ad09a896b5da1f04edf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x139A8 10268 bytes