PDF malware analysis — malicious · 5d9be1ce332a0ce9

MALICIOUS

PDF

83.3 KB Created: 2021-09-06 10:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 7447c261cc2bb5e512c8d694b3a9f774 SHA-1: 402fe8367a8f219e9c0f6b3dd320392319553c82 SHA-256: 5d9be1ce332a0ce91545ec46fd19391464b4775196dd7345e9891493f69c24c5

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also hosts a link farm pointing to compromised websites, suggesting an attempt to redirect users to malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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://garglob.ru/uplcv?utm_term=small+talk+examples+business+pdf PDF link annotation
- http://bfr-bialapodlaska.pl/userfiles/file/54641861715.pdfIn PDF document text
- http://williamshudson.org/clients/3/35/35bf74ce48b5c120232fd40fb4fe3e45/File/66577195173.pdfIn PDF document text
- https://delphin-restaurant.com/ckfinder/upload/files/8636253986.pdfIn PDF document text
- https://thegioidongphuc.net/ckfinder/userfiles/files/linesajizanudasoranis.pdfIn PDF document text
- https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160d791bc465c4---mezodenofikemudixefa.pdfIn PDF document text
- https://alpinashop.bg/files/23685709993.pdfIn PDF document text
- https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160da9146cce2c---5795559282.pdfIn PDF document text
- https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/sfgj34pjpvkdeq2p8ueifr329m/49464181540.pdfIn PDF document text
- http://talcmanagement.com/uploaded_files/userfiles/files/visetetoxuxu.pdfIn PDF document text
- https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/2fb0273736c76f5563c8545cac2ef597/15724943141.pdfIn PDF document text
- https://pielinks.com/UserFiles/file/35298592352.pdfIn PDF document text
- http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bf593ccf675---78930067990.pdfIn PDF document text
- http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf163cb66c---rajaropa.pdfIn PDF document text
- https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/p7tu0tvtqvojnubtqc3v4gnocf/1530481541.pdfIn PDF document text
- http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e3f62a5eb---84104617099.pdfIn PDF document text
- https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/f049e02e9de7c3c9d459e27a6f28295f/wugijuwevesop.pdfIn PDF document text
- https://cairparavel.ro/app/webroot/files/userfiles/files/19554172375.pdfIn PDF document text
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611217b351410---31677913249.pdfIn PDF document text
- https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/47274440533.pdfIn PDF document text
- http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160de8fe816dc5---jozaza.pdfIn PDF document text
- http://praconsulgroup.ru/pict/file/firazeradasa.pdfIn PDF document text
- https://flardochform.se/userfiles/file/goperud.pdfIn PDF document text
- http://ceomit.com/fckupload/file/bevunekifosolox.pdfIn PDF document text
- http://vector-mebel.ru/uploads/files/dajopovimasasasex.pdfIn PDF document text
- http://american-security-inc.com/assets/ckfinder/userfiles/files/gorolupegajesega.pdfIn PDF document text
- http://automsystem.com/UploadFile/file/20210507131137387.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e02c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE02C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f843.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF843	10948 bytes
SHA-256: `9da30202f81f9b8efa5cdf4d0241fcee6595d9ad6f711347f1dc4eea196fcbba`
`font_02_sfnt_off0001115e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1115E	17620 bytes
SHA-256: `7c152e21b61b50a0a8704b9e3f8254ede2a8957eeafcc5b870e5883d99b29654`

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