Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc10ddb7f6891049…

MALICIOUS

PDF

88.1 KB Created: 2021-09-02 20:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: de97a0cbe7e3caa26e4d14b0c66b324f SHA-1: df46fdbb9b5e613dc13de642f38c52bdefc53b18 SHA-256: fc10ddb7f6891049bf70be1f01ab887278471f2d72f394f27eacda4239993c40
164 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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.
  • 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://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd5a1b3e53---xatizitonavubogegep.pdf In PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/2e36c586bac99b894ba7d5e4ea7fad9d/59571472152.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083411cb398b---kebekikuvoxibogirigop.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/16648411802.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/mabatifatulumetefososap.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/zowinuzilaxabu.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/565730c5349b2ad8dca3590e314bb84b/74833207039.pdfIn PDF document text
    • http://tt-ural.su/admin/ckfinder/userfiles/files/34553316744.pdfIn PDF document text
    • https://dragonexpressml.com/userfiles/files/memixujuzamunepobanunatu.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/nozaxitidagejagiregij.pdfIn PDF document text
    • http://cppzone.ru/users/blogs/file/53741784219.pdfIn PDF document text
    • http://bonsite.nl/phpcmsys/file/41131451143.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/5079ff9ec59908e8041b5895af1be53a/xapopagiven.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608289c8f20ed---gimejela.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/760b6fa100cb0e95825303c83c88c1a5/53537255514.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/98767775143.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a9cdb8931---tefivusexibajapovi.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/sf7bakep6ujueedhsrq6ltaku2/42593403637.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/6350f729bcfe14cdce51eefd04c1921c/lupopolunozireg.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/064cbb6d7165f86ac38703c311a23145/wusatapipe.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/lakasowag.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/remitowepitumunaxes.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/ed3c4b7b9413cafc8c4dbf6ffb9a1a4d/muxovaminusobuvuk.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609896fa823ae---lemusavoxosudidel.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0251370368---kazofivo.pdfIn PDF document text
    • http://polletnv.be/uploads/files/wopozinex.pdfIn PDF document text
    • http://positiveforce.in/uploads/files/zenivamarorusijenujagefe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=surds+practice+questions+with+answers+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_off0000f23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23D 17724 bytes
SHA-256: 70f9eeeb3e211ec1c7274e39d251a206cb2f463513400e973dfb7b2be22f4a1b
font_01_sfnt_off000120bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000138d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138D2 11076 bytes
SHA-256: 5438ce7fa6e6c45d74705962d7b8e8c20d70b1ea29ca9736543e95e5e0224ca4

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