Malicious PDF — malware analysis report

Static analysis result for SHA-256 2489c5288ffed766…

MALICIOUS

PDF

87.8 KB Created: 2021-08-16 14:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ef8fe65e5e9673d5e9184a9e035d09ed SHA-1: 4f2e5755bf8dd12a74c0c93b553f712e94e6d634 SHA-256: 2489c5288ffed766502fa9954db8a5fe01e4a58f2eb126f708c54a846a3337d1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which are hosted on compromised WordPress installations and appear to be part of a link farm. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download an archive, providing a password to bypass security scanning. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95'. The presence of embedded JavaScript, though not directly executable in this PDF context, suggests potential for further malicious actions if the user is tricked into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/i29uc9bgphvqin8j4uhbvqrjn2/lufetegu.pdf In PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/6n2fbpmvt06hjack7desjpqh0e/kamafawalitaxages.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/bfd5a4d4c65d4a563aedb5345bf3fb2b/63962826823.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/dudekivopetaviwafu.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/46625877163.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd8c3da206---57860238332.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/37479941788.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//xoluduvajo.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/gilupinedawetizulasafuv.pdfIn PDF document text
    • http://briarcliff70.com/clients/874901/File/pijeta.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/bodatovatinimiloraxiza.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6885c3c1e---88400474858.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d449edbf39---bojifubixibopepogagekinov.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/nejunetejaji.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/mefugavuwusomutevevo.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/5sssqnncpt9bmtl38e2njdafsu/90404365212.pdfIn PDF document text
    • http://millecolori.it/images/file/13690378492.pdfIn PDF document text
    • http://aspbae.org/userfiles/file/lobubimerolat.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/043c3c98825bdc998a2fa39e6b32cecc/zeximazigekurubaxapin.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/11308915035.pdfIn PDF document text
    • https://computerzone.pk/file/logivujal.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/49773599285.pdfIn PDF document text
    • http://splogservice.ru/content/file/teginotenijegejivemuzu.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/be900960da572975e93942bf96687faa/vekajuwetuporufi.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/xidofitoz.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/io3929u8gsa4f673au5hn979rg/42521127586.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/ma5m5mu1muuji698h5t4mo8cd0/luwiperibolumepazogazu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=es+file+manager+download+apkpurePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CE 11004 bytes
SHA-256: c0bad75e4ff8d21a6811ce16b269c77b116acde2ec3c97579cfbe15939d4370e
font_01_sfnt_off0001012b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11938 1800 bytes
SHA-256: 5545ba883571674147e34e5c7fb55b135dc6c580f998ca6a42ba6df08483da46
font_03_sfnt_off000121b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B0 17112 bytes
SHA-256: 178379d95a7a1c8979db4e769cbd0ebb6181d45653a9b7b12e38614a72e36285

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