Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48370204dea0ed3…

MALICIOUS

PDF

81.1 KB Created: 2021-09-07 02:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 26c758ed9d8a512243e26f6d32c8c156 SHA-1: a65bdc2047885aafa987c25a8f6d6981577b84d6 SHA-256: e48370204dea0ed3fb58febb77b285497b116510d5f6cff8358445892223da67
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL analysis and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f513272dbc---85457988097.pdf In PDF document text
    • http://www.dereformasenalicante.com/archivos/files/99083869728.pdfIn PDF document text
    • http://mkbeauty.vn/luutru/files/31280139076.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607221164cb15---49001531954.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/fajupugidofatumabot.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608023019b66f---pukekakanikotumadovi.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/3f8eb7fceade3fb42b77dd4163e85b8c/netoxetunuluvigo.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/9555141643.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a00a1b5dac9---rawewemilowo.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/773995db7d068dd6b72aad95d58f1270/xabow.pdfIn PDF document text
    • https://nieruchomosciturystyczne.eu/files/file/nibakuxezat.pdfIn PDF document text
    • http://elai.kz/upload/2021/08files/210818232813317652f9gct.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/vozejeneviwome.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160886f0f93fe3---ragusogagesixuwu.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/bo94rodp703rhc4jplqkth16v3/joforoxonozuvidawunudorob.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/nofebelakivabavu.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/37884583266.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/sajidogaxafudaze.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/jokirobofajiretorobitewof.pdfIn PDF document text
    • http://goergenpainting.com/clients/0/0d/0d1038892961fdbf96b6a8e7e8daca8f/File/95770803969.pdfIn PDF document text
    • http://feg.vn/uploads/files/razemufategidofu.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/sdugfuc83flnlhurvjg17mqi7i/gigagevuzenadul.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608a37dca15b4---rasowilinaputusutikewowi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=jeep+grand+cherokee+2007+owners+manualPDF 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_off0000d6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DC 17204 bytes
SHA-256: afb284b58df255ba952c0ce57b1658c8ed483acc529fbc219920455b955e4462
font_01_sfnt_off000103be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BE 11332 bytes
SHA-256: 18318cd45beb4b44824c4c7c98dc25d14bf86bd04194a5b0f885f27456865858
font_02_sfnt_off00011e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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