PDF malware analysis — malicious · 6f2f6092be54c126

MALICIOUS

PDF

73.3 KB Created: 2021-06-29 06:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: c0af68c4eb699e6e6e0357b7c7305132 SHA-1: 6c09830fd4a06b33aa674fb1a339a5827f9a945c SHA-256: 6f2f6092be54c126677d47ae965eb97b10ea62f897142b01c5460be72bacc0c9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics indicate the document functions as a link farm, directing users to multiple distinct hosts, many of which are compromised WordPress sites. These links are likely intended to lead users to phishing or malware distribution sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9837

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://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b31622f709---83203623777.pdf In PDF document text
- https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/68813867786.pdfIn PDF document text
- http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/lanaf.pdfIn PDF document text
- http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5de69c275---kasav.pdfIn PDF document text
- http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/940cd5553a26ee9a9f3ee34938a5f8d5/kawakokukuvomikifulatoga.pdfIn PDF document text
- https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607158981804a---18553555582.pdfIn PDF document text
- http://kythuatviet.vn/uploads/userfiles/file/lomilot.pdfIn PDF document text
- https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3970ea41c---9739622147.pdfIn PDF document text
- https://cengilli.com/icerik_images/file/xujovomegowogasusalalawe.pdfIn PDF document text
- https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/40a079aa8ec3a9ed2a5f7362946909c0/munek.pdfIn PDF document text
- http://alburigiott.it/userfiles/files/xiripobanopopovawakobemem.pdfIn PDF document text
- https://rosenstein.lu/userfiles/files/79041036716.pdfIn PDF document text
- https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/e63fb63c32b111137ada6335acd60bd1/xijebijixoguramuvexawelu.pdfIn PDF document text
- https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/bcffaca609eb353c391e4141f2243659/liriw.pdfIn PDF document text
- http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8c7a2bd1b---15246315765.pdfIn PDF document text
- http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607525a15c6c7---56565308326.pdfIn PDF document text
- http://albatrossmrn.com/konadnew/userfiles/file/41818457087.pdfIn PDF document text
- http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160a2abf5079db---48388016270.pdfIn PDF document text
- https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/nhbbfaujlkc91cvc2pt1rm54sa/witoruvojakuwu.pdfIn PDF document text
- https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/c5f598322ae596abc60d425aeb28f1e5/rikijinev.pdfIn PDF document text
- https://akproauto.com/nbloom/fckuploads/file/pisugalewizajumof.pdfIn PDF document text
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb9644541c---51287040346.pdfIn PDF document text
- https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/4c8bfb0c373144c2e1827958a06f2363/xuxuxobedojivupel.pdfIn PDF document text
- https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1e8b864db---kutew.pdfIn PDF document text
- http://ahkjt.com/upfile/file/22954980658.pdfIn PDF document text
- http://casier-a-bouteilles.fr/file/jujoviro.pdfIn PDF document text
- http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee5a4baa19---84810545073.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+import+references+into+endnote+from+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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bebf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBEBF	15588 bytes
SHA-256: `f9bccf6ec61a2e575a99ba074191360d11455dd978faa3c3a11087bb234b6b77`
`font_01_sfnt_off0000e6cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6CF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000fee6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEE6	10652 bytes
SHA-256: `d93c395ebb4a9fb512226a8e805725fbf9dfcc6509d37d7f0a71884113b1b021`

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