PDF malware analysis — malicious · 4f4992249251365b

MALICIOUS

PDF

78.7 KB Created: 2021-10-16 23:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: cb29b4ff14703b0db3e0d9af11f5affe SHA-1: 2eeaf11734447d38168995e64980ff1118e5997e SHA-256: 4f4992249251365bc6efa81957d9cca8231e4a87e84086728b008adf08e75062

134 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript 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 facilitates the redirection to external URLs, as suggested by the PDF_URI heuristic, which are often used for phishing or to download further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://elitvorota.ru/f/file/zosowavewase.pdf In PDF document text
- https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614533cf432ec---mifotamigaz.pdfIn PDF document text
- https://keyword-lda.pt/site/upload/file/gadukokerajozumikefaxaxi.pdfIn PDF document text
- https://binarbaidrealestate.com/public_html/userfiles/file/zitib.pdfIn PDF document text
- http://tehla.eu/userfiles/file/11843197806.pdfIn PDF document text
- https://greenfins-thailand.org/uploads/file/kekivetupinavo.pdfIn PDF document text
- http://gnatowski.pl/attachments/file/26039161884.pdfIn PDF document text
- http://khiensa.com/UserFiles/File/kizokigiri.pdfIn PDF document text
- http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161422b95c9a75---28714979835.pdfIn PDF document text
- https://funcarele.com/ckfinder/userfiles/files/49288847300.pdfIn PDF document text
- http://hoteldanang.vn/uploads/images/files/72391208234.pdfIn PDF document text
- http://webbolt.fono.hu/data/editorfile/30846055389.pdfIn PDF document text
- http://ketoanaca.com/uploads/image/files/76615837951.pdfIn PDF document text
- https://ncsccalgary.com/userfiles/files/79417225708.pdfIn PDF document text
- http://pazzo.jp/js/upload/files/35435922807.pdfIn PDF document text
- http://xn--tnqz8hz5cb8l.com/upload/files/kevamozoda.pdfIn PDF document text
- http://le-nora.com/userfiles/file/juruvipubovixokaliwuxu.pdfIn PDF document text
- http://onelove.cz/file/sexuduxorep.pdfIn PDF document text
- http://zamgph.com/uploads/file/031545548581.pdfIn PDF document text
- http://ukwoodrecycling.com/userfiles/files/dirulugipez.pdfIn PDF document text
- http://dailyxedayhang.com/userfiles/files/pazigebonadizolevamipon.pdfIn PDF document text
- http://thanuyentea.com/ckfinder/userfiles/files/riwukejurisaledu.pdfIn PDF document text
- http://www.bluefashion.cz/ckfinder/userfiles/files/ralomomifiguj.pdfIn PDF document text
- http://work4shop.cz/userfiles/file/86507202813.pdfIn PDF document text
- http://sintjorisparochie.nl/userfiles/file/disuvebodowagunasixodu.pdfIn PDF document text
- http://feedproxy.google.com/~r/MbOu/~3/D9plVHj2VOU/uplcv?utm_term=tic+tac+toe+fitness+gamePDF 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_off0000cb7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB7D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e38f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE38F	18504 bytes
SHA-256: `5f3d78884e572f233b7fc5880d194ecc0a9f600780dc3e32b49750a07ca56a48`
`font_02_sfnt_off0001141f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1141F	10496 bytes
SHA-256: `7ed59f61fd0a4d5f61fee5139891fe2a2a2c9e2d72e1da059834d218fd3af979`

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