PDF malware analysis — malicious · a9cb58c65fed2ae3

MALICIOUS

PDF

80.5 KB Created: 2021-05-03 22:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 1f6f401ee565f61aa17451aaa53c033c SHA-1: dfe4ab83a5392071fa4e18b5eb717222943d1151 SHA-256: a9cb58c65fed2ae3252acb4d449d40a31e187a220e33d0224fd0cb5cdd075d33

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The primary URL, 'https://lozipotod.ru/strik?utm_term=how+to+connect+cobra+microtalk+walkie+talkies', is presented as a guide but likely leads to malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of it being a phishing or malware distribution vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://lozipotod.ru/strik?utm_term=how+to+connect+cobra+microtalk+walkie+talkies PDF link annotation
- https://cdn-cms.f-static.net/uploads/4457876/normal_604e2f9bbf7d1.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4449774/normal_5fc72a6730d87.pdfIn PDF document text
- http://kugaraginoja.mypressonline.com/87205529412.pdfIn PDF document text
- http://terugate.mypressonline.com/fovugezusabuforejes.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4458849/normal_60025781973df.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_f0d391a8f3a4424993842a2285172b32.pdf?index=trueIn PDF document text
- https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_71072ac372f0478d80da4ba26558cb4d.pdf?index=trueIn PDF document text
- http://jusopetikikij.onlinewebshop.net/zutug.pdfIn PDF document text
- https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_4b43a917690840dead65a3403d4682ca.pdf?index=trueIn PDF document text
- http://dezinolabebosod.atwebpages.com/padasi.pdfIn PDF document text
- https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_ab57a4d48cdb4879878104e239e6a3df.pdf?index=trueIn PDF document text
- https://5090cb7a-f7dd-45b7-a4a3-960150b62b23.filesusr.com/ugd/dfd4af_e08e08d2993b4170868af1908a0d85fa.pdf?index=trueIn PDF document text
- https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_6fc79f0af1594b83b506158332e49678.pdf?index=trueIn PDF document text
- https://691dfa98-c543-4342-b77d-a3d7fbf094aa.filesusr.com/ugd/d55835_e812fb41aab2409792c2d1ca9610e3a0.pdf?index=trueIn PDF document text
- https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_ba2b59b5d8b84f478b45868970a11cfa.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/b7f6762f-9de0-4610-976d-01ecda91c725/frindle_book_club_questions.pdfIn PDF document text
- https://82c1a4a6-0aea-44ab-842b-07cb5bdde860.filesusr.com/ugd/aafee9_66532ec5cb364d97911fab7945924a2e.pdf?index=trueIn PDF document text
- https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_1621b378fdd749d790c76052e3608178.pdf?index=trueIn PDF document text
- https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_27a2c2a0780d4657aeec7bffafe9db1f.pdf?index=trueIn PDF document text
- http://wugujub.onlinewebshop.net/network_marketing_secrets_russell_brunson_download.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3afa0bd6-43ee-4a33-a504-b0c2c2cb8e88/pavel_tsatsouline_books.pdfIn PDF document text
- https://77701ba7-c5ad-4750-ab17-5b03548f7fc0.filesusr.com/ugd/9a242c_3f76450408af4d94bc9d0b742f2c3313.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f173.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF173	4988 bytes
SHA-256: `db5209b2cf54304f1aaca462ec05f039212bf6c4c3a8778b547a84713b24fd19`
`font_01_sfnt_off0001024a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1024A	10356 bytes
SHA-256: `13d714e8a7bdfcbfa68e314a17b10fc4bac24ff8675a3375a928830be7666183`
`font_02_sfnt_off000125df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125DF	4324 bytes
SHA-256: `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`

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