Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e748888275df1d…

MALICIOUS

PDF

96.8 KB Created: 2021-07-01 14:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 83c503941bd5c5770701525d9563fa20 SHA-1: df904ea022a7ebb64f59c64983ceed67440f32e0 SHA-256: 56e748888275df1d85dc3ef45010bee02e4568a0f4528b52d98a0582f32edd87
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to potentially malicious content hosted on compromised or disposable domains. The presence of multiple links and the use of compromised CMS uploads suggest an attempt to distribute phishing lures or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 https://alice-immo.com/userfiles/file/58172273135.pdf
    • http://ehsclassof64.com/clients/b/bf/bfa5c4411462ceee4a19e543862d902c/File/pasegejefopiloku.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acd4fb1ce91---gibimi.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/q1t2i8idhkp9a8vts7k8hrg3j0/51362717146.pdf
    • http://augustaelectricalwork.com/editorData/file/zuwamifutepafekatizi.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160910f013ad77---4305615780.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16090558a87a80---9467342018.pdf
    • http://xn--80aikni6a0b.xn--p1ai/images/file/21130245943.pdf
    • http://uniroll.pl/user_images/file/zetakabadububudefarimafa.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16085806af042a---tudaturegiginotuko.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160706ecb9e0f8---70411265217.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/cd6502bab9a0c7718511325b6965b1f3/54142743709.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce17aa9639---35109443002.pdf
    • https://weddingitaly.jp/images/file/fukurepexo.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c03798c4fe7---24535447543.pdf
    • http://anoh.net/pds/userfiles/files/bubup.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/99ada8741332ed197515d0c316d24e52/92573458534.pdf
    • http://iphysiology.ru/upload/wobibexozakawaja.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/3c1147ef4b5489753b24eb3955c372aa/pivomabunevazoximotop.pdf
    • https://digicpictures.com/downloads/menanoxaweneko.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/f319e9d10728a830fa9d4dd06c594b13/gogosudugekafowujenamu.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdfa9bd014---23091916947.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=parkour+maps+for+minecraft+education+edition
    • 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_off0000f8e8.bin
8e8a91793516381931af1d76e071fd6c3e726f794705bbee1b3be7492b4b469c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E8 10928 bytes
font_01_sfnt_off0001123f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1123F 16792 bytes
font_02_sfnt_off00012a51.bin
c2c890ed69dcad370c7e89f58896fe5835cb476dc56b0b1f9cb1354606d25184
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A51 30424 bytes