PDF malware analysis — malicious · 70f8f366e81ac88e

MALICIOUS

PDF

71.6 KB Created: 2021-09-26 15:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 4c21f848fe5f887e19850bdcb3ab62ce SHA-1: 90eedf8b22a978196a95c0ca7770f52494d04063 SHA-256: 70f8f366e81ac88e5aa390daf992f8bc7057a04e0f576f23a35edc4abd5e310f

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous external URLs suggest a phishing or spam campaign aiming to drive traffic to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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
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://infrive.ru/uplcv?utm_term=halloween+ringtones+for+android PDF link annotation
- https://floridagreatescape.com/media/file/92699277805.pdfIn PDF document text
- http://tecs4.com/intranet/ckfinder/userfiles/files/baxobipinupekoku.pdfIn PDF document text
- https://portalbime.com/UploadedFiles/New/file/41880091898.pdfIn PDF document text
- http://linuxnewyork.com/draft/media/94347453246.pdfIn PDF document text
- https://www.lsv-wittlage.de/ckfinder/userfiles/files/84055577396.pdfIn PDF document text
- http://wsm.hk/images/uploadfiles/file/lexijozebas.pdfIn PDF document text
- https://mchs.kz/userfiles/File/99402553884.pdfIn PDF document text
- https://almuhja.ps/ckfinder/userfiles/files/62576842432.pdfIn PDF document text
- http://c2ctrading.org/cms_upload/files/dadawufaramozexovipo.pdfIn PDF document text
- http://turksebruiloften.nl/userfiles/file/85248708985.pdfIn PDF document text
- https://gentrilieu.vn/userfiles/file/pofevefevavevupavagos.pdfIn PDF document text
- http://k-sta.kr/FileData/ckfinder/files/20210911_A305125D143EEE39.pdfIn PDF document text
- http://a2hgghk.handylover.com/upload/files/76203290667.pdfIn PDF document text
- https://sherwoodchamber.org/ckfinder/userfiles/files/39211763850.pdfIn PDF document text
- http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/balavux.pdfIn PDF document text
- https://berbagiangka.com/contents/files/pupug.pdfIn PDF document text
- http://artwatch.ru/userfiles/file/maguparajowuzufasewaf.pdfIn PDF document text
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613985ecb7593---18012706206.pdfIn PDF document text
- http://schokofontaenen.de/idata/27903000472.pdfIn PDF document text
- http://metisentry.net/ckfinder/userfiles/files/57533767553.pdfIn PDF document text
- http://lagrupacio.cat/file/kamodenunugaxowulugorus.pdfIn PDF document text
- http://phanbonvino.com/media/ftp/file/36702329855.pdfIn PDF document text
- http://change4best.ru/upload/file/47293815442.pdfIn PDF document text
- http://pcserviszlin.cz/ckfinder/userfiles/files/77508028072.pdfIn PDF document text
- http://katour.ru/admin/ckfinder/userfiles/files/21803137304.pdfIn PDF document text
- https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614dcc91666ca---luboxo.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_off0000b4b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB4B6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cccd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCCCD	10608 bytes
SHA-256: `aa990ee8085bfd0add1a45f8f7bc75a41416d7b5a198eeda4a29abf7a5c73baf`
`font_02_sfnt_off0000e4f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4F5	17200 bytes
SHA-256: `641d79017dd22b9ef74ebaa18db79346a56d9341f89da3d78da00a3dcb6acb2c`

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