Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34e27be20228a4e…

MALICIOUS

PDF

88.2 KB Created: 2021-07-17 02:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 81b48c1301e2036a369bfcac741d515c SHA-1: 0fc0d68f2da1f41cd04f9982e0c3c4cb71350a10 SHA-256: e34e27be20228a4e2a485de54b1a17e3d828ad0ee9c6805456913eba0b01d685
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and contains numerous links to external sites, many of which are hosted on compromised WordPress installations or disposable domains. The 'SE_INVOICE_LURE' heuristic indicates the document's content is designed to trick the user into taking action, likely by clicking one of the embedded links. No scripts were extracted, but the presence of multiple external links suggests the PDF is intended to redirect the user to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://debo-fit.be/userfiles/file///74613678969.pdf In PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ddbe29bb3---tekesikoxajitifuw.pdfIn PDF document text
    • https://serini-cloud.pl/uploads/editor/file/86047336203.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/3c066fcbb1d9eaecfcc7479ebc8803a2/xemarajivom.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/12241710960979e255a385.pdfIn PDF document text
    • http://healthywithhart.com/res/file/22353895998.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b12786f9c---nemikoferiwidelipevutu.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/6c1eab3421401cf0d5c177c84ff2c5ac/mumexerejetu.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/relurewafomefomojewoxawul.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/83792115027.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/9bcf4786049c190a203a7f885bec36d4/nexexapizoxesakefurexezi.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/52378733187.pdfIn PDF document text
    • https://srmresidences.com/images/bulk_images/files/30747131563.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents//files/5834881739.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/xumid.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/ff46f1f98e9f1f8d1f7d866e7e302b10/43219748881.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fd7c2c866---milar.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a2543ad836654ce0d7ab390732aa110c/21843780569.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/rubinizapamopupezedaxeniw.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/kuvimonelilijebulonewu.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/negip.pdfIn PDF document text
    • http://polish-house.com/uploades/fckeditorfile/fupiji.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/6694680945.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb0308749e---7219885047.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/d5bc666df2349208de01261696f078eb/1787052583.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ee503a0a82b---zabujusuna.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=hotel+room+service+coverPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF684 17876 bytes
SHA-256: e766997c6ecd60d1023431aba31e5fb0f55a590e5248a034766758f7f45e1223
font_01_sfnt_off000124e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E1 10180 bytes
SHA-256: dd2c17973c5a01cf221981e963d66805dbffe2a91455f0af1c0ad3c6ce8282df
font_02_sfnt_off00013bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1