PDF malware analysis — malicious · fe0d30c5f49e1e76

MALICIOUS

PDF

96.7 KB Created: 2021-06-29 22:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 5727acf41859a8a16855aaef6ea94dc3 SHA-1: b7dc8425aa3d90a02ce27ff026356e0201b94d21 SHA-256: fe0d30c5f49e1e764900c7d05251256ab3d1aa52e7b52ba9746dfeb462186f92

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of a link farm on disposable hosting and compromised CMS upload storage further supports the phishing lure attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9746

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 https://krisoc.ru/uplcv?utm_term=one+piece+ending+soon PDF link annotation
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/i97tqbgpig81gcasu54pimt4p6/67031494219.pdfIn PDF document text
- https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/o4h77c5vekfdmbs688b5appnjc/filanozixedinomekowazab.pdfIn PDF document text
- https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/df395170daf3e6271bc61981f1d53e37/1322951368.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3e12b4e42---45960556592.pdfIn PDF document text
- https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4e06c89f3---laxisufuxefibajaxaxoreru.pdfIn PDF document text
- https://investmentskillsgroup.com/images/userfiles/file/68690507787.pdfIn PDF document text
- http://akcjonariusz.com/UserFiles/file/20075541440.pdfIn PDF document text
- http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f95f1bc7ab---81633563035.pdfIn PDF document text
- http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986c7d6a4f8---98093816516.pdfIn PDF document text
- https://aspirans.com/files/file/88051131137.pdfIn PDF document text
- https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/c0651e2b440af09b3e8091d32fb06ecd/11173832153.pdfIn PDF document text
- https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/0d293db83db08374a54a7f11594cecfa/rekutepevob.pdfIn PDF document text
- https://avenue102.com/uploads/file/nezifenolow.pdfIn PDF document text
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718dddb5f5c---74206365846.pdfIn PDF document text
- https://rybczewice.pl/userfiles/file/8349177530.pdfIn PDF document text
- http://chalappuram.com/userfiles/file/62997034165.pdfIn PDF document text
- http://bigxra.com/uploadfile/file/2021051110312973499.pdfIn PDF document text
- http://csptech.net/admin/userfiles/file/4189223380.pdfIn PDF document text
- http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870d03c5c91---15854858295.pdfIn PDF document text
- http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa771236cd---lobufivotigejasar.pdfIn PDF document text
- https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/1o6q24a9uptro5l5qbhlpu7so2/dimisibipu.pdfIn PDF document text
- https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/293c70b7a9b954b9ba0195875c4b6f0d/13005316501.pdfIn PDF document text
- https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/m1fin020sdj28f0s6d8mrrpq4s/vugizelowakujoneriwo.pdfIn PDF document text
- https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/0b28c1c6580ad90e4dc50c2d6a7142e9/28155181598.pdfIn PDF document text
- http://soepcentrale-dekeyser.be/userfiles/file/rulopipemivep.pdfIn PDF document text
- http://robedecreateur.com/img/files/80431210490.pdfIn PDF document text
- 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fbda.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBDA	25164 bytes
SHA-256: `d0facde011ed022fd52c579f1597e87de53c32dd7ba8f7aaf1aed0d97c254102`
`font_01_sfnt_off00013991.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13991	2880 bytes
SHA-256: `b04ab496c4fb1ca79363e6e363ceec1970d75bce4d439236f8c9807ebc6ef63a`
`font_02_sfnt_off000145b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x145B7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00015dce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15DCE	10308 bytes
SHA-256: `064f5b02d5f7e32f9215b6768c853d5da8ebd59b3048c578a6d923349233df8f`

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