PDF malware analysis — malicious · b7a98e28fd63fcdc

MALICIOUS

PDF

92.1 KB Created: 2021-07-01 10:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 1ea2065d9cd0fa7d2a9c5e8d5f742041 SHA-1: 72ac9015b9a72623e86be5201a253cf969298abd SHA-256: b7a98e28fd63fcdc693bf1eb9f9f07babe3cc070170015f5f5c4ae122952e0d3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a link farm, with numerous URLs pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

Nyx PDF Classifier malicious score 0.9850

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.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607106e4066a0---9992463742.pdf In PDF document text
- https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cabb8bb9d4c---pezusefabonutidemuxinuv.pdfIn PDF document text
- https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/17o0p5j4dv3e05bvokvhrs64l0/rolexino.pdfIn PDF document text
- http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850a1255b05---47227947930.pdfIn PDF document text
- http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f8361fe87---1995337837.pdfIn PDF document text
- https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8543fab966---dofifepowefoduberumoxew.pdfIn PDF document text
- https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/99214c98368fe4a5f93532d2224ada7c/gopitobafemalipifoxox.pdfIn PDF document text
- http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a1889a8f700---5761753223.pdfIn PDF document text
- https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/p5qidnqeap0elob85g5r3eq49g/bovobaluzimopegiwozus.pdfIn PDF document text
- https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7723a5d74afa292ba0283b788246a457/81615288428.pdfIn PDF document text
- http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16077c8375920d---45265861583.pdfIn PDF document text
- https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767e19263eb---sezoza.pdfIn PDF document text
- http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/582842f0da7f0089a4a62b8206a9db62/xusipulopujakuxuvezukij.pdfIn PDF document text
- http://technoculture.cz/admin/upload/file/geximiv.pdfIn PDF document text
- http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ff8d5763f---wunokibosudag.pdfIn PDF document text
- http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160943f7847af3---bogevogiki.pdfIn PDF document text
- http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a74a9754027---bilegimozoxenuzefudep.pdfIn PDF document text
- http://www.benyowsky.com/resources/files/81135576196.pdfIn PDF document text
- https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160716d3af1bb5---91352244209.pdfIn PDF document text
- http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082bf5707a25---15705920582.pdfIn PDF document text
- http://www.northern-japan.com/image/upload/File/23409882614.pdfIn PDF document text
- https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/e5605de0cc8ba17ab5e07156d531685a/43270609336.pdfIn PDF document text
- https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d51a3072559---30204535000.pdfIn PDF document text
- http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160be77c398ce7---sifuxevawa.pdfIn PDF document text
- http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef424c779a---fivuxurezegu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=definition+of+irratePDF 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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_006_off00014450.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x14450	18360 bytes
SHA-256: `0185d2ac674f82d20b14138693fb59c29912ac4c6a1acdff92a79c250ac71cae`
`font_00_sfnt_off0000cee7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCEE7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e6f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6F9	23188 bytes
SHA-256: `64b283f9d4c6b842bcf8a581b679bfa06910931404e9ba1dff1a02f8d8cf5c00`
`font_02_sfnt_off0001209b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1209B	9992 bytes
SHA-256: `111ae852d5cc297ccc6b64345cef8869656f603bbda07c98db8654e579f97a1b`
`font_03_sfnt_off000136d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x136D6	3464 bytes
SHA-256: `a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff`

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