Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ced230b4d1aebc…

MALICIOUS

PDF

81.0 KB Created: 2021-09-06 01:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 973e526566f42fe4fdf3f901fcfae1e3 SHA-1: 94638e0ef41ec27eeb4f1b3f2b1e01f2d6c401a9 SHA-256: 69ced230b4d1aebca8c08589d3e22b9c768b1994c2cd02efb32a635eb60d66c5
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://cructi.ru/uplcv?utm_term=marmiteira+eletrica+lenoxx+manual
    • http://fapannimario.it/userfiles/files/pemivupegajufazasipo.pdf
    • https://elsadaulte.com/ckfinder/userfiles/files/gukitufuke.pdf
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/wobewubotivudaxofivif.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339c5b458ee---41976862579.pdf
    • http://patanamachine.com/imgUpload/files/pukev.pdf
    • https://burlingame.com/wysiwygfiles/file/kejedasavujubinaxi.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/8f36b3aec26d1bae41f0d5d542955909/dutizesosibezopeliv.pdf
    • https://bestcaps99.com/ckfinder/userfiles/files/vanedodafovefugigotorikam.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870b67e9e64---nezelebakufaposonu.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/38b160f57ec9b8877bb55cdb5396af51/zovopebolufuxevew.pdf
    • https://tavcam.com/upload/ckfinder/files/reguwobezizi.pdf
    • http://dribblebar.pl/userfiles/file/xegesajuzuni.pdf
    • http://rafaelokazakov.com/file/11004726191.pdf
    • https://propactionvehiclesuk.tv/userfiles/files/nezujo.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160987fb830e7b---kipasoromagaza.pdf
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/tizafuseb.pdf
    • https://zhbiotech.com/CKEdit/upload/files/58708875193.pdf
    • https://bevelec.com/bevelec/dossierMois/file/48483544693.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edbfde2c844---mozuvuguvimatelivusidaj.pdf
    • http://cmtsport.com/pliki/46938843742.pdf
    • https://regionalhealthprogramsww.com/images/file/8329123443.pdf
    • http://gaongonmaiphuong.vn/webroot/img/files/5338787411.pdf
    • http://anhbanglaw.com/userfiles/file/54799286158.pdf
    • http://grapevinewinerytrail.com/clients/876125/File/wulutuxulimasedorudaw.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/e4f9ae64d83e4e1b89ae5388d79805cd/gubarapuzuwawevoxaj.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f13bd00ee2---59046648380.pdf
    • http://thietbiotovn.com/Images_upload/files/17028324264.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3c1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C1 16792 bytes
font_01_sfnt_off0000ebd3.bin
c4f6f052ccbd080a5dab1425920e570e89f0a093a39816cb108632f330c0ea93
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD3 19208 bytes
font_02_sfnt_off00011d61.bin
b4072f6f9f0ddfaf80cde94004c9bfeabbfbfe8ae032d3368e17c078903e8c4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D61 10416 bytes