Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb4d3c6214b39c4…

MALICIOUS

PDF

75.8 KB Created: 2021-08-05 04:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e8df1304e564fe35b1e4ec9d370f9afd SHA-1: 44b377329e42dcdb8e5efcfc6e0811a6b7478c87 SHA-256: 0eb4d3c6214b39c457f0e654a7a14f1ea164b72781ac23485d9c2cd1961896e5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://yilip.net/userData/board/file/45688506166.pdf In PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/f9718c79fbff8990958dfbb60d80e103/lelurek.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62376deef8---39323468410.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/38382165819.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc8224189f---6985402813.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/ladipugunubekalekar.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c68fc8ec714---42351319527.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/powelasevetebubifeb.pdfIn PDF document text
    • http://tmtechvn.com/webroot/img/files/dukogoxepatowebixajirag.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d97e46250f---7555250620.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/remedugiletajineloma.pdfIn PDF document text
    • http://twxcd.com/img-aim/files/kuguxolonuviguzaz.pdfIn PDF document text
    • http://autofox.lt/ckfinder/userfiles/files/17893610696.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/11788945722.pdfIn PDF document text
    • https://schmitz.cz/res/file/vanurelefiz.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/35lcgrrq1mobh5d5vd05vht07o/xomevumovebedapabo.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents//files/watipafolu.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607f19bf8c17e---budakeboluzisan.pdfIn PDF document text
    • http://packturf.fr/files/76426445814.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b69248390---jonabewafirejurawuxizilun.pdfIn PDF document text
    • http://ned.ru/uploads/files/foruvanix.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/11469259284.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/ae673c0cecfff67584ac18c4a2b50957/5916347327.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=rogue+trader+tau+character+guide+pdfPDF 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_off0000c65d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC65D 16128 bytes
SHA-256: e2c4848d19d58d690f8f9787b24657c2cfad0c4351b6250563455f6a06018394
font_01_sfnt_off0000efa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C0 10728 bytes
SHA-256: ff099470eecc3cd50975d549422c925ace5cf696b2b7b05ea767226459232287