PDF malware analysis — malicious · ee8cedda871696c0

MALICIOUS

PDF

81.7 KB Created: 2021-07-08 09:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 0d819a5f905972e2080a1d0096fa3d8b SHA-1: 68e788036a2782ff4e17f9f9bac0c9c634bac554 SHA-256: ee8cedda871696c084ba0a95decf7c7094dd068fcd4d87aa9c37162e220d93a1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, directing users to numerous websites, many of which are hosted on compromised WordPress installations. The embedded URLs are designed to lead users to phishing or malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9933

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 https://chcial.ru/uplcv?utm_term=find+the+greatest+5+digit+number+which+is+exactly+divisible+by+12+18+and+24 PDF link annotation
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0833ebfc0e---toxeban.pdfIn PDF document text
- https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/catf825ifojbe15vf1sqlnq3b4/43476563197.pdfIn PDF document text
- https://cissud.com/uploads/ck_editor/files/83023535913.pdfIn PDF document text
- http://studiotecniconuti.it/userfiles/files/34640457347.pdfIn PDF document text
- https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/fa5f3af9f62c8535bf855dcb6d3cabc8/68893616627.pdfIn PDF document text
- https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/umstnjcp5u87g8fh43u8afk2f0/pevanefo.pdfIn PDF document text
- http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c689c880a9c---36874289640.pdfIn PDF document text
- http://geasit.it/userfiles/files/vakaj.pdfIn PDF document text
- https://rendiamovisibiliglinvisibili.org/file/46603405699.pdfIn PDF document text
- https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/jgih2du19745ilt81644orhnop/51435496177.pdfIn PDF document text
- https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/9ad964fe0d112d3e27c6d331f2b02978/gopinasadijazejizerikewo.pdfIn PDF document text
- https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/po5k37rsd08197nla2ndgk4tsu/79895672836.pdfIn PDF document text
- https://mmoxx.mn/userfiles/files/88268326335.pdfIn PDF document text
- http://premium-h.info/files/files/xenokofedavo.pdfIn PDF document text
- http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfad8d2b41---35539779735.pdfIn PDF document text
- http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c46426d279c---navusirera.pdfIn PDF document text
- https://j26clean.com/upload/files/25826414216.pdfIn PDF document text
- http://ohsclassof73.com/clients/9/9a/9a21b0b253f7c4eafe662346d237c286/File/33392393026.pdfIn PDF document text
- http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e53f64482b6---novimofo.pdfIn PDF document text
- http://uhy-th.com/image/upload/files/96557032466.pdfIn PDF document text
- https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/5e73b204d55381be2542a126f57137c4/82205875863.pdfIn PDF document text
- https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a7da832e660---fasariwefoxulexoxu.pdfIn PDF document text
- https://noddy.nu/images/file/lilovak.pdfIn PDF document text
- http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a152f55dcb7---21159418070.pdfIn PDF document text
- https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1cf4bc106b---zupadudepufegak.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_off0000bd91.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBD91	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d5a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5A8	11872 bytes
SHA-256: `0d5c06faf17cd65501f8d8d91a616e4abbf13ff22bcccb3c2955a60de2bc41c8`
`font_02_sfnt_off0000f1e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1E7	17412 bytes
SHA-256: `3f2f0c0d497630bf42c07af3b1c75bf8e1963dcc011e18f31f4d7d69ea70a977`
`font_03_sfnt_off00011f93.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F93	16088 bytes
SHA-256: `450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c`

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