PDF malware analysis — malicious · 70b847853fa73c7a

MALICIOUS

PDF

83.1 KB Created: 2021-09-13 11:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: fee9ac250cc0b3f2a4cbda85d7317cc1 SHA-1: b91fce7386e70e414229298512658b6bf9c76b8d SHA-256: 70b847853fa73c7ae408117d04746ac512792dad342602880bcea88745f3a095

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was flagged by ML and ClamAV as malicious, with a high confidence score. It contains an embedded JavaScript stream and numerous external URIs, indicating a phishing or malware distribution attempt. The presence of a link farm on disposable hosting further supports a malicious intent, likely to redirect users to malicious content or download additional payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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://wastran.ru/uplcv?utm_term=fake+japanese+credit+card+generator PDF link annotation
- http://soeurs-scjboran.fr/soeurs/upload/files/43901548234.pdfIn PDF document text
- http://songhakbbq.com/uploads/files/25498600755.pdfIn PDF document text
- https://mabuksusu2.com/contents/files/ritovewe.pdfIn PDF document text
- https://niboparis.com/upload/fckeditor/file/1630668674_1.pdfIn PDF document text
- http://scandirent-new.ru/uploads/assets/file/kawetedupoloneminuri.pdfIn PDF document text
- https://xehowo24h.com/images/ckeditor/files/11066606305.pdfIn PDF document text
- http://architettosbaffo.com/userfiles/files/57931188462.pdfIn PDF document text
- http://nabisori.com/userfiles/file/39016452481.pdfIn PDF document text
- http://hoangle.vn/uploads/userfiles/file/nowedawapusomaro.pdfIn PDF document text
- https://alariel.be/userfiles/file/39915916713.pdfIn PDF document text
- http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/pajes.pdfIn PDF document text
- https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/51c42d20471a466ee41f3ec435dddf31/51198787544.pdfIn PDF document text
- https://guruamardaspublicschool.com/userfiles/files/41318477506.pdfIn PDF document text
- http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/tofemutibinujepapof.pdfIn PDF document text
- https://datatalk.ilvzhou.com/upload/files/2021/09/202109111749285098.pdfIn PDF document text
- http://yuanhebiotech.com/upload/files/novawutowabugezus.pdfIn PDF document text
- http://podwierzba.eu/ckfinder/userfiles/files/495894892.pdfIn PDF document text
- https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/zujiz.pdfIn PDF document text
- http://shimamura-mail-order.com/userfiles/file/84778114511.pdfIn PDF document text
- https://nidi.mk/ckfinder/userfiles/files/33868190247.pdfIn PDF document text
- http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/vavotalumozok.pdfIn PDF document text
- http://kalmi.ru/upfiles/files/68981368924.pdfIn PDF document text
- https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130dacf91bf4---jetafogomulonedezuburulo.pdfIn PDF document text
- https://www.loisirs-auto-occasion.fr/ckfinder/userfiles/files/pifori.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_off0000deb9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEB9	10840 bytes
SHA-256: `a9c74066c9d69d606ffced11d5ba1c5165db5342a9ba93695118e4a77576e24f`
`font_01_sfnt_off0000f7a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7A7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010fb9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FB9	18200 bytes
SHA-256: `d8659049bb790a385cf866deafb7da4256a448a8cffd51b497dc2903fd66336d`

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