PDF malware analysis — malicious · 7352508d94e7b933

MALICIOUS

PDF

69.3 KB Created: 2021-09-26 17:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 149519b4a6b3ce15259f6e3281a2c295 SHA-1: 732622b849865d99e03be18f21bb5a869e39ad1e SHA-256: 7352508d94e7b93398c559a311b63c852e38986d4f8bac5656f3faff1929d7c7

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. It also features numerous external URIs, many of which are part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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://pistant.ru/uplcv?utm_term=forensic+medicine+and+toxicology+book+pdf+reddy PDF link annotation
- http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/30936323121.pdfIn PDF document text
- http://smcertificationservices.com/userfiles/files/darawudokuxuji.pdfIn PDF document text
- http://alpinedelhi.com/userfiles/files/44823753052.pdfIn PDF document text
- http://velisend.ru/photos/file/posudukorifudemuratudemek.pdfIn PDF document text
- http://timeyear-v.com/userfiles/file/25547186401.pdfIn PDF document text
- http://banlinhkienlaptop.com/userfiles/file/manini.pdfIn PDF document text
- http://davobio.com/upload/files/jonusixugebowojiwa.pdfIn PDF document text
- https://www.bramfordgc.co.uk/ckfinder/userfiles/files/gelapalusawu.pdfIn PDF document text
- http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/998789958.pdfIn PDF document text
- https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2c27906f118e56ac5092b71b1bffef41/xiwilegozuvoriw.pdfIn PDF document text
- http://erainbowrealty.com/userfiles/file/23556212192.pdfIn PDF document text
- http://hilimall.ae/uploads/files/zokoputusigazeborunu.pdfIn PDF document text
- http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/44436659464.pdfIn PDF document text
- https://nedimgame.com/calisma2/files/uploads/2696594358.pdfIn PDF document text
- http://campbellelectronics.com/uploads/376536788.pdfIn PDF document text
- https://eghamatyab.com/basefile/bainbookcom/files/bijabajode.pdfIn PDF document text
- https://webaruhaz.codefon.hu/js/ckfinder/userfiles/files/54559947879.pdfIn PDF document text
- https://trisyscom.com/userfiles/file/63103843642.pdfIn PDF document text
- http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/161384c3054159---bogenupejuvereti.pdfIn PDF document text
- http://babyindex.nl/images/uploads/pijuxulovul.pdfIn PDF document text
- http://yonseri.org/userfiles/files/kexefizefog.pdfIn PDF document text
- http://nachhilfeschule.havonix.com/ckfinder/userfiles/files/1939369027.pdfIn PDF document text
- https://konyaalotaksi.com/userfiles/file/4893182563.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_off0000adcb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xADCB	15576 bytes
SHA-256: `0a005f6521b2d2f7e25e769c62a0c33a01c1592c84e6c3f1ed065d0451c3542b`
`font_01_sfnt_off0000d472.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD472	11388 bytes
SHA-256: `684e324f053a782528cc3fa61cca5d5ce027d3ad0987c22686503dc2155a7e1b`
`font_02_sfnt_off0000eeeb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEEB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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