PDF malware analysis — malicious · 64f5e0fdde792c44

MALICIOUS

PDF

83.6 KB Created: 2021-04-07 20:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: c764dd6f9ceee923ac4dcbb372bca84d SHA-1: 9d1216c60a5d0604051297950c490eecdc6f7623 SHA-256: 64f5e0fdde792c44ae0d8dd732758a52d3feec99e53e9d2a1adf2363bcbbee3a

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a high concentration of them pointing to disposable domains and acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and the link farm heuristic suggest the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 5

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.
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://dafemum.ru/strik?utm_term=onn+radio+bluetooth PDF link annotation
- http://xtw2.club/1802745830568b3t.pdfIn PDF document text
- http://womans30planet.com/las_barreras_de_la_comunicacion2sd6i.pdfIn PDF document text
- https://cdn.sqhk.co/lokiwejawe/ePhgrjc/jetazevisasa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417408/normal_6055ce77816f6.pdfIn PDF document text
- http://livemavuxedu.getenjoyment.net/rorufo.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4447631/normal_5fc8160f23479.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392652/normal_60323b1595220.pdfIn PDF document text
- http://mifvideo.space/719143229425bbyk.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449605/normal_604507bebdd4c.pdfIn PDF document text
- http://vumejopiraxu.mywebcommunity.org/annotate_tool.pdfIn PDF document text
- http://varnisvakq.ru/wexatavazefurajx0rcs.pdfIn PDF document text
- http://organicnu.info/bissell_cleanview_swivel_rewind_pet_brush_not_spinning4who1.pdfIn PDF document text
- http://nulivanofika.mygamesonline.org/23909617259.pdfIn PDF document text
- https://cdn.sqhk.co/xuxibila/i6nhfgd/xuvusego.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/zuwimadaneb/gagufusetoxesokoko.pdfIn PDF document text
- https://7b9449e5-51e9-4a7e-81f5-8587c42320f9.filesusr.com/ugd/571bad_e1a58fe649b44ab4878c5c50ac55a1f1.pdf?index=trueIn PDF document text
- http://zuputes.atwebpages.com/xigukogagufalejodi.pdfIn PDF document text
- https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_78a530afa8ff4027917b1f4467804fd7.pdf?index=trueIn PDF document text
- https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_a4ed63aa9bc94e62846030a26cefa5a4.pdf?index=trueIn PDF document text
- https://5c9c3928-af7d-4195-9e43-9647d7263c15.filesusr.com/ugd/508998_3e65efeadaae4f0c876430745f552500.pdf?index=trueIn PDF document text
- https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_77120b0eff144740a5dd8faf8db7dc13.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/votubukaxogilix/butejojibufabeberamosa.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://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ea78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA78	4904 bytes
SHA-256: `75fa410960083dc39901a41cbe6b11d0094186ed7220a244bf70ba4d6b4b1b2c`
`font_01_sfnt_off0000fb06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB06	2544 bytes
SHA-256: `0b93c9f8e658ea1b6fd510cb26220fdeab3510605faadc4eab0242924ec6f547`
`font_02_sfnt_off00010614.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10614	10684 bytes
SHA-256: `6d4a3499691dec8b75d3dbcec909a95025be55843a077ed4c15d265996e2e242`
`font_03_sfnt_off00012aee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12AEE	16392 bytes
SHA-256: `954f30c1cce2e3a00f07cb0ababb04bf86a3a3c34ed8da2fc782bdc014231390`

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