PDF malware analysis — malicious · cefc13097b73fcfd

MALICIOUS

PDF

70.0 KB Created: 2021-09-07 14:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: faec6a0233a5e640e8589aefc2608c5d SHA-1: 79900ba6fb45a1a1e43b9266ce75a90c64100168 SHA-256: cefc13097b73fcfd29c2bdb55d540efcbd8519b8523ff322d7b3c8785b449f26

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 ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects to external URLs, such as the one found in the PDF_URI heuristic, which is a typical phishing or malware delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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 http://musclecar-taps.com/js/upload/files/86853591560.pdf In PDF document text
- http://frezerovka.by/images/fxeditor/file/vowedapiwamunapika.pdfIn PDF document text
- https://livre-art.com/ckfinder/userfiles/files/23053838039.pdfIn PDF document text
- http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a41f1bbfe49---71745155249.pdfIn PDF document text
- http://99hospitalitygroup.com/ckfinder/userfiles/files/futepogawutomerezut.pdfIn PDF document text
- http://myshopekerala.com/userfiles/file/42275947151.pdfIn PDF document text
- https://noihoithanhtuan.com/media/ftp/file/33378041551.pdfIn PDF document text
- https://fulzugaskozpont.hu/files/jojefomapafalal.pdfIn PDF document text
- http://aitrans.cn/UploadFile/file/F1202107080714344279.pdfIn PDF document text
- https://pavillonwohlen.ch/userfiles/files/bawirazojovomun.pdfIn PDF document text
- https://kopari.hu/files/file/feripakopivizexejupiwe.pdfIn PDF document text
- https://pacantioquia.org/aym_image/files/jokigukolokixuputif.pdfIn PDF document text
- http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ced0d6fd7---nukopazes.pdfIn PDF document text
- https://tempegaring.com/contents//files/ludigobomewadigutazimev.pdfIn PDF document text
- http://tsmsaldature.it/userfiles/files/10786598048.pdfIn PDF document text
- http://astorandblack.net/emailer/userfiles/file/51162148078.pdfIn PDF document text
- http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bbed83330---pokerevo.pdfIn PDF document text
- http://elvirajogsi.hu/ckfinder/userfiles/files/47897657703.pdfIn PDF document text
- https://2acontractor.it/images/file/zowopaxugodiw.pdfIn PDF document text
- http://royalleasingny.com/admin/images/file/boromuxabasapu.pdfIn PDF document text
- http://ilovehikari.com/uploads/files/didotubafavitibafab.pdfIn PDF document text
- http://infinijewelry.com/userfiles/file/16598630412.pdfIn PDF document text
- http://christopherdallo.com/file/35221880775.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=wansview+q5+camera+manualPDF link annotation
- https://b2cdemo.tickets.com/content/files/wulimonagibupedebu.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_off0000b1dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB1DD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000c9f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9F4	10696 bytes
SHA-256: `c5f78fc28017a8a1d88e3210c781ba1a0b60e64ed8ac67746cdb1d4b5874e1e5`
`font_02_sfnt_off0000e28a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE28A	15924 bytes
SHA-256: `be5400d92ee63b5da2a530240f05c338814049e7dded6a40fb8c4928e073abd6`

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