PDF malware analysis — malicious · 9874feb013868c2a

MALICIOUS

PDF

82.2 KB Created: 2021-09-20 16:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 64a726dbd11d6d3e90d538bd90722d11 SHA-1: 1b9c9c9c0a26132a0935e48839799bb508ae1f89 SHA-256: 9874feb013868c2ad5d3ec9bcd95c6bd598a04ff33fba747ac0da4d3af66e8b6

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' and the presence of numerous unique URLs suggest a link farm designed to redirect users to potentially harmful content. Although no scripts were extracted, the structure and embedded URLs point towards a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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://solelane.com/ckfinder/userfiles/files/14810500168.pdf In PDF document text
- https://www.canoe.ro/Extras/ckfinder/userfiles/files/karivunuwabomupowozuje.pdfIn PDF document text
- http://cobmedia.hu/include/44914311965.pdfIn PDF document text
- http://solo-reisen.com/media/images/file/81378873725.pdfIn PDF document text
- http://gmicropilotes.com/uploads/files/tomafobozuponukipuf.pdfIn PDF document text
- http://arrhythmiaclinic.com/userfiles/file/20210919205724.pdfIn PDF document text
- https://widepolymers.com/userfiles/file/93251153249.pdfIn PDF document text
- https://nls.vn/upload/files/62687190840.pdfIn PDF document text
- https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/51697104390.pdfIn PDF document text
- http://xn--k1akb4c.xn--p1ai/userfiles/file/wowurilewu.pdfIn PDF document text
- https://www.fangjin.org/ckfinder/userfiles/files/mulipewonofakujog.pdfIn PDF document text
- http://sd-admin.fazendapenaazul.com/ckeditor/uploads/files/gagorubizozojesif.pdfIn PDF document text
- https://fcksa.com/ckfinder/userfiles/files/32345845940.pdfIn PDF document text
- http://matsonconstruction.net/userfiles/file/digekidilizurizejimam.pdfIn PDF document text
- https://schmitz.cz/res/file/kebifefid.pdfIn PDF document text
- http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16146ea6a8afbf---30380613216.pdfIn PDF document text
- https://dammesliepas.lv/ckfinder/userfiles/files/lutatutibuwolewiwoj.pdfIn PDF document text
- http://businessvaluationapp.com/fck_files/file/wuwopevisidenene.pdfIn PDF document text
- https://regionalhealthprogramsww.com/images/file/47060159752.pdfIn PDF document text
- http://transbur.ru/admin/ckfinder/userfiles/files/razevifudivunepimabulexe.pdfIn PDF document text
- http://ilkconstruction.com/Images/Media/files/72468131157.pdfIn PDF document text
- http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/juzoz.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/8006d3fe27f34a6666366e8564f16165/53834623391.pdfIn PDF document text
- http://kxqcgs.net/filespath/files/20210914192428.pdfIn PDF document text
- http://szm.hu/userfiles/file/23362159309.pdfIn PDF document text
- https://polaria.cz/images/file/gimin.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=spyzie+full+mod+apkPDF link annotation
- 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_off0000dd1d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD1D	10632 bytes
SHA-256: `aee77a0b9e855dad8ff961f594b42870eda374d2e67343eea32fcd7dbe3fb8b2`
`font_01_sfnt_off0000f582.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF582	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010d94.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D94	17500 bytes
SHA-256: `0adf38dd6c57b16b362f65d9fddd118069bacf25f72e493f217b33634d23893c`

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