PDF malware analysis — malicious · a7ddc291d671eec0

MALICIOUS

PDF

78.0 KB Created: 2021-09-16 20:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 0b3374324d5a9c1ff3ddea4c34f1281f SHA-1: 709641a84f6df4f346b6ec56c410e0bcac7e93e9 SHA-256: a7ddc291d671eec0d27b4e80b39a1eb8ccb1055951b933f3ead7130bd6b35b4e

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it is designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the PDF is used to host a large number of links, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9943

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://krisoc.ru/uplcv?utm_term=angry+birds+epic+play+market PDF link annotation
- https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141978598ca8---67281521812.pdfIn PDF document text
- http://danchrisjewelry.com/userfiles/file/papavovezuruxuje.pdfIn PDF document text
- http://scouttautomotive.com/editor_uploads/system/files/52425198761.pdfIn PDF document text
- https://jbdclothiers.net/emailer/userfiles/file/wakofagat.pdfIn PDF document text
- http://mindatpeace.us/uploads/files/76647835798.pdfIn PDF document text
- http://www.veslovani-vsb.cz/soubory/file/bemixe.pdfIn PDF document text
- http://elai.kz/upload/2021/09files/210906084724397167klgsc.pdfIn PDF document text
- http://farmandari-sarvestan.ir/images/news/files/8688407969.pdfIn PDF document text
- https://ctners.com/ckfinder/userfiles/files/29997112800.pdfIn PDF document text
- http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/divikadene.pdfIn PDF document text
- http://denki-shonan.com/uploadsfile/82257929023.pdfIn PDF document text
- http://canadianrockies.ca/files/file/biletasuvarunuzagumotu.pdfIn PDF document text
- http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/68241645604.pdfIn PDF document text
- https://lucky-erotic-massage-bucharest.ro/ckfinder/userfiles/files/73859365872.pdfIn PDF document text
- http://e-park.es/img/uploads/files/2153884590.pdfIn PDF document text
- https://aihr-iadh.org/uploads/FCK_files/file/15449773430.pdfIn PDF document text
- http://studiotecnicomancini.eu/userfiles/files/80954429531.pdfIn PDF document text
- http://tofuyatogo.com/uploads/files/26229930406.pdfIn PDF document text
- https://doosradashak.in/ci/userfiles/files/tatuseboxaxamopo.pdfIn PDF document text
- https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613beb99bbb52---81443462968.pdfIn PDF document text
- http://hicoweld.com/shop/fck_file/file/17635515504.pdfIn PDF document text
- https://palezieux.com/ckfinder/userfiles/files/72378254408.pdfIn PDF document text
- http://baracenter.be/userfiles/file/41651180856.pdfIn PDF document text
- http://mecaniquekd.ca/upload/file/desejo.pdfIn PDF document text
- https://membermimpi.com/contents/files/vemuwatimuwug.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_off0000bf1e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBF1E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d730.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD730	22276 bytes
SHA-256: `887a26d6cd9e3f9e6a90290372e01c6cdcff5e2e0a2a631bc8cc896c9fb4afbb`
`font_02_sfnt_off00010f72.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F72	11064 bytes
SHA-256: `a5f9d7327ad953ba4a8d38f1b41f399d5d0634576a7546d033a7927be8fd3226`

Open this report in the interactive analyzer, or submit your own file for analysis.