PDF malware analysis — malicious · 58da3534a6e48758

MALICIOUS

PDF

71.3 KB Created: 2021-09-26 16:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 617081197cce9b31dc1c07195d8d8cc4 SHA-1: 6f0df87957e672febd62bf88b2790f7664033300 SHA-256: 58da3534a6e48758b6d0746eca01e86b388fa2813e2d99d73dff26c3c7bdf15b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document functions as a link farm, directing users to various URLs, many hosted on compromised CMS platforms, under the guise of providing free manga PDFs. The presence of external URIs and link farm heuristics suggests an attempt to redirect users to malicious content or download further stages.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

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
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.
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=akatsuki+no+yona+manga+pdf+free+download PDF link annotation
- http://volkshilfe-ktn.at/images/content/files/rafubupajesokab.pdfIn PDF document text
- http://zetrade.cz/userfiles/file/84728816928.pdfIn PDF document text
- https://umartravel.com/files/74979812778.pdfIn PDF document text
- http://geriatriccarenewjersey.com/userfiles/files/kujabilidafivowe.pdfIn PDF document text
- http://icloudcleaners.com/uploads/account/autoresponderfiles/28802319697.pdfIn PDF document text
- http://exmar.it/foto_fck/file/zedarexifabeme.pdfIn PDF document text
- https://parfumzone.ro/files/file/lorifaxuxoro.pdfIn PDF document text
- https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/a512f86ab2a5c69cd0e4a495e067f29d/87102710341.pdfIn PDF document text
- http://minerva-collection.net/files/files/ranodirizipefuzusizulip.pdfIn PDF document text
- https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362f1e40d2e---bamofonudodixirofokoda.pdfIn PDF document text
- http://herbwaterthailand.com/userfiles/files/29272196593.pdfIn PDF document text
- http://teknis.it/userfiles/files/54310514253.pdfIn PDF document text
- http://www.yeosung21.or.kr/ckfinder/userfiles/files/1631476582.pdfIn PDF document text
- https://organicfertilizerproduction.com/d/files/xodadakalixobaposagorira.pdfIn PDF document text
- http://www.thaitofu.com/image/upload/File/29884818754.pdfIn PDF document text
- https://aaaxxion.info/images/file/86053669845.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6be60edb2---9611746872.pdfIn PDF document text
- http://hyundai-dongdo.vn/images/files/nefes.pdfIn PDF document text
- https://atlaskvartir.ua/data/uploads/files/72985885720.pdfIn PDF document text
- http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138553db397a---gizakolusigenugogovoraw.pdfIn PDF document text
- https://infrapanel-alegjobbfutes.hu/userfiles/file/pebexiligazos.pdfIn PDF document text
- http://maftplayer.net/calisma2/files/uploads/galikojopotukesejitivazo.pdfIn PDF document text
- http://ucinnovation.ru/admin/ckfinder/userfiles/files/17785083958.pdfIn PDF document text
- http://zzquansu.cn/d/files/7154946600.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_off0000b03b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB03B	11212 bytes
SHA-256: `83f6697a25e8bbe526bedb1f6bb4b5db0233976c0f98eb3d1f902921575acc1a`
`font_01_sfnt_off0000ca64.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCA64	17096 bytes
SHA-256: `4d616ef35f7dcbcc2ee7becf0ee07b2b00903c83db359a8eec7a0848484e8208`
`font_02_sfnt_off0000f5c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5C1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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