Malicious PDF — malware analysis report

Static analysis result for SHA-256 3078511b226323d3…

MALICIOUS

PDF

87.9 KB Created: 2021-06-25 22:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 491eab996c79ab435d2b55a1213bbb94 SHA-1: 6d4049f263c5f8458b97c93299847b2382dede64 SHA-256: 3078511b226323d3b5c6ac8f82e25fa2d2485063da777c1eb361e577cd4474ce
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a significant number of links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=best+songwriters+of+today
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5f5ae20a6---riguzi.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608292bb2295b---mufaji.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b60ef4d60f---97853352828.pdf
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/8108417321.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c860d3bba7d---veporumuvelamozifariva.pdf
    • http://geoplan.su/userfiles/file/zurigodiwazemojelatu.pdf
    • http://hopkinshigh62.com/clients/7/77/7764523e397120ad9b09b1da26998858/File/69921765215.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3141cf816---dejekulawu.pdf
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/kosizogewigodogakajugu.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aebf87b466---94063673257.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f836be9319---4680391931.pdf
    • http://firegallery.ru/img/upload/gotezosajuvarevu.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c50d823574---33847809367.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608659db1a50b---85895345841.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608addbeb66b4---61315517182.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b833fa25eaf---71394234346.pdf
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/1eca35f0d02c0cfcf88e8990c762f29a/sozopenojowovipul.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/132nmol5j3feoj47pr2hjnd0k5/82434737121.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/5ee56cb918eb3a51b19297b7ef11f6a2/nogebizodu.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/96bd66f62bf3b4c445a756f52a57c7dd/48071939426.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160904946147e2---sefafuvowunaro.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d085cd0b24d---8827273822.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d396db6f44---nemuxekitevuruvinepe.pdf
    • http://choinka4x4.org/cms/files/file/39580547668.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/q366u8f3fvto6n9go9he69lhi6/jazaweliworevamididamuluv.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/v79fi890h117ijph7cthlud532/19665935253.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f266.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF266 16792 bytes
font_01_sfnt_off00010a78.bin
64b0b84c0d00f10fdef42cff2f09d453b6a47a538ea3a3e8a24ef2c99205e5c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A78 17972 bytes
font_02_sfnt_off000139c4.bin
80643f31d1a2b38ef312910dc9291ed64632ce37179f6d5212812b59a966de42
pdf-font-stream PDF embedded font (sfnt) at offset 0x139C4 10736 bytes