PDF malware analysis — malicious · 76812d1130810712

MALICIOUS

PDF

86.8 KB Created: 2021-09-09 10:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 88ebe44b3fb76a8c8635370c82748d7f SHA-1: 1612420b28d8f0eae4f268047947328e586d1f52 SHA-256: 76812d1130810712e23453d6e39993b52a006a63e06c279fb3c2a3f056928ed5

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely to redirect users to phishing sites or download further malware. The embedded URLs, such as 'https://coretry.ru/uplcv?utm_term=malena+movie+free+download+480p+bluray', reinforce this by appearing to be lures for content downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9922

Heuristics 5

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.
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://coretry.ru/uplcv?utm_term=malena+movie+free+download+480p+bluray PDF link annotation
- https://stephankeppel.com/userfiles/file/98282487836.pdfIn PDF document text
- https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/8q2nd5gdv2d6al38c5kfta7v32/dirimodidivaz.pdfIn PDF document text
- https://grandiosieventinuziali.it/filesUploads/file/93868191063.pdfIn PDF document text
- http://zubrcup.by/files/files/18207902490.pdfIn PDF document text
- http://allefrgycg.news-read.com/upload/files/10941717667.pdfIn PDF document text
- http://malopolskiszlakwinny.pl/upload/File/79145474783.pdfIn PDF document text
- http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/babetuniwizezapelo.pdfIn PDF document text
- http://isspskola.lv/userfiles/files/59634619011.pdfIn PDF document text
- https://medicentrumnz.eu/medicentrum/files/file/novakamigaranuraxino.pdfIn PDF document text
- http://integrotech.pl/zdjecia/file/93266273547.pdfIn PDF document text
- http://zs-oilfieldequip.ru/d/files/88749824947.pdfIn PDF document text
- http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/161365d6243118---62394915772.pdfIn PDF document text
- http://mojahotels.com/ckfinder/userfiles/files/tizekesinesupur.pdfIn PDF document text
- http://huzatfokozo.hu/editor_up/58318519400.pdfIn PDF document text
- http://coral-travel66.ru/admin/ckfinder/userfiles/files/xatoxitavevigovinetasej.pdfIn PDF document text
- http://ecolservizinettuno.com/userfiles/files/87690005579.pdfIn PDF document text
- https://mannoorpally.com/uploads/file/rebalabo.pdfIn PDF document text
- https://www.hsbofmn.com/ckfinder/userfiles/files/sorupokagofafevurobosaka.pdfIn PDF document text
- http://barsugo.com/ckfinder/userfiles/files/87034976891.pdfIn PDF document text
- https://sona3elkhair.com/userfiles/file/6497163678.pdfIn PDF document text
- http://tnslib.net/userfiles/files/857364235.pdfIn PDF document text
- http://podarox.ru/public/files/4830013428.pdfIn PDF document text
- https://ka-base.no/images_students/files/61557298030.pdfIn PDF document text
- http://thenikharvconsultancy.com/userfiles/file/34779991992.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
`stream_002_off0000d3b5.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xD3B5	17612 bytes
SHA-256: `4949d076e2786b45f9b060f41689d4b21f1281b663aad3b1d105f0465a3ec0b2`
`font_01_sfnt_off0000ee21.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE21	17156 bytes
SHA-256: `9abd0616a07f16874d3a020699626cf785503a275fa6a836e57de22fd39153f7`
`font_02_sfnt_off00011aa0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11AA0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off000132b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x132B7	11300 bytes
SHA-256: `62b6a1c4d7e4eaaeb7080ed31fe19c41ef2e07b27d44abf361277ee94a12558e`

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