Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0fe65bd81a6ea7e…

MALICIOUS

PDF

85.4 KB Created: 2021-07-01 20:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 00bbec99d965a222d1c5ba6323feccd7 SHA-1: 320a0476b5875c6d7cb28ab8d189000292e0ff63 SHA-256: f0fe65bd81a6ea7e26c498ae58fe11a49d00684cbcb05f6aa51b92b9eb656479
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload storage and disposable hosting. The embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16091e7a3ef313---firabojubujubaxexaduvexuk.pdf
    • http://aisef.org/uploads/userfiles/file/file/kojitososo.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/07c226df201a3c4393386ce424cf76b4/jagodis.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/eqnvujrlji36b753s8n47u7sr6/jeloko.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/bc043a5c2b8be7b5c3d4beee2e4dfdd4/vuvodarine.pdf
    • https://amatnieks.com/pictures/image/37483342540.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/4a2iactk4koqghjdufbu7s6cvn/jugozizerexilaxiti.pdf
    • http://slenderclub.cz/ckfinder/userfiles/files/92683661167.pdf
    • http://chandigarhdatarecovery.com/files/file/97490476720.pdf
    • https://rabudiagnostic.com/userfiles/files/kokiv.pdf
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/3cde440f623875ed77435fb95e711df0/60337577233.pdf
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/okbte86q5bghnrhvsoctkr5vpu/44145611862.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e67b3268e---40894626199.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d97c18c340---8619034906.pdf
    • http://wchs65.org/clients/b/bb/bb65574a37642f7fe3135935df861e67/File/46434980642.pdf
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/l2vmgiotil5jgtd4a958r34vng/wagorejav.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/8cff506e931ff2266cc86a391391a9e9/naferulosifososodizerus.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160accdb9f15d0---tovavafekivanodaweme.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d0b94cd4f---66679045808.pdf
    • http://www.mostex.sk/files/articles/file/4128561991.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9e07d0da5---68928831466.pdf
    • http://all-pass.com/folder/editor/file/83785145897.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fbc61d5cb73f3bd8e1dd7f3209e20cbb/47172417213.pdf
    • https://smilepaper.tw/archive/upload/files/razoj.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aacc1eb77a4---repolukubexipazetoxumu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=white+worms+in+vagina
    • 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_off0000ec62.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC62 16792 bytes
font_01_sfnt_off00010479.bin
f551ceb2bbefcb4130e83c336df1befa23369dea2aae3a5f679b10b1bcc6f793
pdf-font-stream PDF embedded font (sfnt) at offset 0x10479 10656 bytes
font_02_sfnt_off00011ccc.bin
3cdb088193c4faf8b4c8ceb05e12e103e5b4e229b687463e6cfbdf8adb7c3d66
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCC 17048 bytes