PDF malware analysis — malicious · 6aa4517162bf00ef

MALICIOUS

PDF

83.9 KB Created: 2021-09-12 17:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: e83b113e47bd2ba18262e6de2241e04a SHA-1: 0447db67dc9e3f4ff4d7f16e74fb4f6ff0b46a27 SHA-256: 6aa4517162bf00eff3aeb18d8458f1abe7d37ef6bfb5a10ae73fe83b975f7e15

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to T1059.007, and the nature of the document suggests it was likely delivered as a Spearphishing Attachment (T1566.001).

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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
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://irlanc.ru/uplcv?utm_term=army+d7+dozer PDF link annotation
- http://equipociclistaugeraga.com/ciclistas/userfiles/file/kusojeluwajiwo.pdfIn PDF document text
- http://jinyezi.cn/upload/98478764898.pdfIn PDF document text
- http://salman-group.com/userfiles/file/taropawomu.pdfIn PDF document text
- http://quesnelbusinessnetwork.ca/userfiles/file/lamalepudov.pdfIn PDF document text
- http://alfonsoguiggiarchitetto.it/userfiles/files/juxipik.pdfIn PDF document text
- http://picassogift.com/Uploadfiles/files/62131275173.pdfIn PDF document text
- https://voyageaventurenepal.com/upload/files/xomajosozilelufolaxif.pdfIn PDF document text
- http://balaton.varosom.hu/userfiles/files/podogelezupa.pdfIn PDF document text
- https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134bb8eb4504---34242578082.pdfIn PDF document text
- http://bluebirdcanada.com/FileData/ckfinder/files/20210904_F2964CFD35C79A8E.pdfIn PDF document text
- https://tidaksusah.com/contents/files/81421340787.pdfIn PDF document text
- http://globomax.eu/userfiles/file/42330314972.pdfIn PDF document text
- http://clairvoyantinfotech.com/demo/images/90151063759.pdfIn PDF document text
- https://dacola.com/upload/files/2092339347.pdfIn PDF document text
- http://xn--oy2b9bv81anouola.com/upload/file/202109020337574896.pdfIn PDF document text
- http://maymaygiaydachidang.com/upload/files/sefezaxewerotilutaxex.pdfIn PDF document text
- https://www.psk.com.au/application/third_party/ckfinder/userfiles/files/6420475118.pdfIn PDF document text
- http://parfumland.sk/upl/25354477247.pdfIn PDF document text
- https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/97474646671.pdfIn PDF document text
- https://sooryasales.com/uploads/file/5931184524.pdfIn PDF document text
- https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/8852646199.pdfIn PDF document text
- http://chieusangducphat.com/uploads/userfiles/file/46232322296.pdfIn PDF document text
- http://www.kickcommerce.com/userfiles/file/88255119058.pdfIn PDF document text
- http://aptwash.com/userData/ebizro_board/file/78031313776.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_off0000e531.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE531	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fd47.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD47	9944 bytes
SHA-256: `ce1d40598a2f3e37bb8319b2356538016fa11c1e89afcd230abe2cca39c8efdf`
`font_02_sfnt_off00011350.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11350	17864 bytes
SHA-256: `44684a5673948b4735c65ab50bcff12e877c09bedb8d20a36612f5c9cf34afe2`

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