Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f05021b95f97d9b…

MALICIOUS

PDF

118.4 KB Created: 2021-06-26 15:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 79d3e213146190d5d795ebdcb5ca01f9 SHA-1: 819be5637a715fe25b79a8cf2846fe3a4bb17ea2 SHA-256: 2f05021b95f97d9b08609b6305986136a4a5c053a093cd0b5a9a0054e29e0732
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to multiple compromised websites hosted on disposable domains, likely for phishing or malware distribution. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

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://allytemp.ru/uplcv?utm_term=my+hero+academia+first+movie
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/7aj1vk7sku7olvpb2ggfvlesvv/43084128045.pdf
    • http://amuseonline.com/absite/userfiles/file/54688649104.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/68fe1c3530b4593a97db4d41ed2e661e/bejuravebefo.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c5165e071---dekagepasijifobuwap.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091cc8760b82---zalosedawoxeta.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4752827d9---visuromalidevuvufofuva.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16095be9f533f3---5884999789.pdf
    • http://etasystem.net/userfiles/files/91158919776.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/o03l2u04u1ctdno1cm03v2ibi3/pojujom.pdf
    • http://studiotecnicoprato.eu/userfiles/files/nuvozupitososotusu.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/volikaxobugemodetizevom.pdf
    • https://vandolderskb.com/images/usr/gilerebisunewadozav.pdf
    • http://cn-noah.com/uploadfile/file/27687808459.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/f1bb068832250356e2c33a3f6188302c/mupujelogagorok.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/9804f4e90e15f26021862733a03f7ac0/vifolom.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ba724f415e6---17005064646.pdf
    • http://stylowa-pss.pl/userfiles/file/73923474167.pdf
    • http://adabaskimerkezi.com/upload/file/sisinakexidub.pdf
    • http://www.cddfct.com/up_files/file/17658140169.pdf
    • https://ivanda-commerce.hr/userfiles/file/50591746484.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074c92627b7e---44039143148.pdf
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011926.bin
f2ce456d2d108fac610452430d771865656c7e98124c6d2daec1b2fc4b4ac7e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11926 18792 bytes
font_01_sfnt_off00014a96.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A96 16792 bytes
font_02_sfnt_off000162a4.bin
2bc44c89832e86147ec166a2c0f51557e3e516baaf504e8eaf27a236dce38de3
pdf-font-stream PDF embedded font (sfnt) at offset 0x162A4 18108 bytes
font_03_sfnt_off00019afa.bin
e30398e86bc9198bb2e417f916c8ed2ea33a6d1127b3a9e9c9ec8b72f47ba906
pdf-font-stream PDF embedded font (sfnt) at offset 0x19AFA 16332 bytes
font_04_sfnt_off0001b10c.bin
84081d4692c896ec00852d5b5a8e693fbd3ea3396e4ff22fe5c182bc03fa8b37
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B10C 10764 bytes