PDF malware analysis — malicious · 4b167e244e3bcfbd

MALICIOUS

PDF

80.3 KB Created: 2021-09-15 08:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: b0b1f2f4c6da5082936e3be5bf348b42 SHA-1: 3e6be4aa798e72a8fcddb87c4030f52cc2f37dd4 SHA-256: 4b167e244e3bcfbd40eb815c6ea4dfab606f99b31538b3f717fc6a92c8f3e909

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which are part of link farms hosted on compromised or disposable domains. The primary lure appears to be a fake download for 'traffic rider hack mod apk unlimited money', directing users to a URL that likely serves a malicious payload. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://pixomot.ru/uplcv?utm_term=traffic+rider+hack+mod+apk+unlimited+money PDF link annotation
- https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139181f3c6ad---watiwunedubamexuloxe.pdfIn PDF document text
- http://hzdsbg.com/uploadfile/1630489353.pdfIn PDF document text
- http://praguetransfer.com/files/file/98181960516.pdfIn PDF document text
- http://cosyromania.com/media/file/fupazivikepevodu.pdfIn PDF document text
- http://nanchang.chinatupai.com/web/js/ckfinder/userfiles/files/4808052321.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614173dca215a---14904734060.pdfIn PDF document text
- https://advantagelic.com/singhania/downloads/file/kazusuweganagu.pdfIn PDF document text
- https://opsclown.it/ckfinder/userfiles/files/fisotajaluviz.pdfIn PDF document text
- http://krzeptowski.pl/file/70745254319.pdfIn PDF document text
- http://hanart21.com/files/userfiles/file/bobadusojorewozow.pdfIn PDF document text
- http://thebeautyofdesign.nl/ckfinder/userfiles/files/neduxejatisofujagage.pdfIn PDF document text
- https://nakipoglugroup.com/upload/ckfinder/files/57680526357.pdfIn PDF document text
- http://milwaukee.center/userfiles/file/67694518709.pdfIn PDF document text
- https://rsvforum.com/userfiles/file/80593928934.pdfIn PDF document text
- http://nhadatv.com/webroot/img/files/28092952962.pdfIn PDF document text
- http://arucax.am/user_images/file/levuteropax.pdfIn PDF document text
- https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/5470bf2c1c6cbd5f346ebb9881a295eb/1544232828.pdfIn PDF document text
- https://everestart.com/images/stories/file/93901648736.pdfIn PDF document text
- https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141106fae45f---miguwibidotoveposob.pdfIn PDF document text
- http://bn-biz.com/userData/board/file/wivizekipofofir.pdfIn PDF document text
- http://ayrh.internet-match.com/upload/files/71161712869.pdfIn PDF document text
- http://mim2010.ru/userfiles/file/11431875311.pdfIn PDF document text
- http://jshtextile.com/UserFiles/file///60032543360.pdfIn PDF document text
- http://citranco.com/users/files/35909493327.pdfIn PDF document text
- https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130da18d08f0---18168974017.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_off0000d4e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4E8	17416 bytes
SHA-256: `4f0509290912e3bf37dceaae5c2cd1bcfee68887d2b08f5ace1fa357490dc216`
`font_01_sfnt_off00010206.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10206	10988 bytes
SHA-256: `a1b92588e72419af2c77b586a81662d1fde5848e3edbfed6c2799851035ab1b1`
`font_02_sfnt_off00011b61.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B61	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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