PDF malware analysis — malicious · 609e9f3dc442b7bc

MALICIOUS

PDF

84.1 KB Created: 2021-10-07 02:37:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 507a65506ff7a73905cdcb5e271e239b SHA-1: 4ad85b642e751d07dd69464bc7a330a2e1ec2157 SHA-256: 609e9f3dc442b7bc67f1c214177ae9cffa73b4776bbd20cc98866766c1f747dc

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 presence of numerous external URLs, many pointing to PDF files on various domains, suggests a phishing or credential harvesting attempt, or a distribution point for further payloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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 http://billsky.ee/files/file/60046006396.pdf In PDF document text
- http://profiklub.sanswiss.cz/files/file/428889605.pdfIn PDF document text
- http://ambvetsanprospero.eu/userfiles/files/63873687068.pdfIn PDF document text
- https://speedwayinfo.hu/uploads/file/rexokikuretifete.pdfIn PDF document text
- https://contemporaryteas.in/admin/uploads/file/fusabupasatetugijozida.pdfIn PDF document text
- http://sgrappresentanze.eu/userfiles/files/jivinadixepojikivadirejud.pdfIn PDF document text
- https://iwanbim.com/userfiles/files/93734175.pdfIn PDF document text
- https://ataru.site/js/ckfinder/userfiles/files/tejowoselo.pdfIn PDF document text
- http://www.focitabor.hu/userfiles/file/makesakigi.pdfIn PDF document text
- http://hyundaihungthinh.com/uploads/images/files/wuvemofokakuvosisolagap.pdfIn PDF document text
- http://dija.lv/public/userfiles/file/bikenedeziwasivexaxeboja.pdfIn PDF document text
- https://kovtec.pl/eurostyl/photos/file/83906943656.pdfIn PDF document text
- http://bet-balance.com/userfiles/file/jipiroxitop.pdfIn PDF document text
- https://pmeds.us/userfiles/file/4672602811.pdfIn PDF document text
- https://generalaudit.pl/eurostyl/photos/file/ratepukusabipadetude.pdfIn PDF document text
- http://pribatu.lamilagrosaimport.com/images/files/56267087234.pdfIn PDF document text
- http://netart.hu/userfiles/file/dolaponipixi.pdfIn PDF document text
- http://mylodge-naoshima.com/images/blog/file/janamofid.pdfIn PDF document text
- http://kidsjeodo.com/images/files/92806791764.pdfIn PDF document text
- http://sgd42.ru/userfiles/file/pikatokewodibetipaj.pdfIn PDF document text
- http://vkts.se/userfiles/file/tikamapabikexorak.pdfIn PDF document text
- https://holcom-wd.holcom.vn/webroot/img/files/fujisuruvujivoxogigez.pdfIn PDF document text
- http://wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/33358285561.pdfIn PDF document text
- http://thepokewave.com/uploads/files/80926260424.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=weather+in+savannah+in+julyPDF 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_off0000e0e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0E7	19188 bytes
SHA-256: `035f6b53b4f2ad2d3ae348837ffbf8b3181a34716e473bd8dee20c1c6edd655a`
`font_01_sfnt_off000112e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112E9	10488 bytes
SHA-256: `e86a6b39c1e89b609dae13b125ac2ece141bfcec9434192bb0486fa63bdce381`
`font_02_sfnt_off00012aae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12AAE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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