PDF malware analysis — malicious · bed2ff6f8a0fe57e

MALICIOUS

PDF

85.9 KB Created: 2021-03-23 10:34:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 9e0301908ef808baea72cd412ecf1d51 SHA-1: b4c84498e51c7d372ff00628c806fd4fc0c883ee SHA-256: bed2ff6f8a0fe57e1e59cacd781803afd4fa03fd52ad473baa1c72484fed06fc

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a malicious document, likely delivered via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/123?utm_term=pinkfong+baby+shark+font PDF link annotation
- http://fartook.online/passport_renewal_application_form_japan31coh.pdfIn PDF document text
- https://cdn.sqhk.co/tokititagiwe/7pRjgib/how_to_write_a_small_business_plan_sample.pdfIn PDF document text
- http://buwovavozu.getenjoyment.net/worx_14.5_amp_electric_chainsaw.pdfIn PDF document text
- https://cdn.sqhk.co/bidogefapo/FihVwpw/wanebox.pdfIn PDF document text
- https://cdn.sqhk.co/nujobuja/fNTghhf/project_manager_job_description_funny.pdfIn PDF document text
- http://peuly.xyz/rusunegowetolesenesgclg.pdfIn PDF document text
- https://cdn.sqhk.co/jiluputumusi/ge7hiSO/hockey_predictions_for_tonight.pdfIn PDF document text
- http://koxelovanalimu.getenjoyment.net/65328104934.pdfIn PDF document text
- http://bitcoinchat.fun/8026538603hf1a0.pdfIn PDF document text
- http://xesapuwax.mywebcommunity.org/72853876898.pdfIn PDF document text
- http://opsnatur.fun/rafuws3a71.pdfIn PDF document text
- http://warowusavi.mywebcommunity.org/59517697766.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/86890088-c926-4205-865c-86fd6cc50527/watuvan.pdfIn PDF document text
- https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_5968636f6b024118b2d40e48f17d9b42.pdf?index=trueIn PDF document text
- https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_2631858830944e44937b00c48581217d.pdf?index=trueIn PDF document text
- http://gezixus.myartsonline.com/gefolupezidi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c8227e2b-1ae0-44f0-87a2-494a3e6c3872/37378624821.pdfIn PDF document text
- https://s3.amazonaws.com/resixexi/texas_go_math_grade_7_answers.pdfIn PDF document text
- https://s3.amazonaws.com/masevewi/gidamugixinol.pdfIn PDF document text
- https://9ec55029-67b1-4fe0-9a5d-40fd638ac594.filesusr.com/ugd/dc5a51_eedfa004e059413a82cae74901f051a9.pdf?index=trueIn PDF document text
- https://7b9449e5-51e9-4a7e-81f5-8587c42320f9.filesusr.com/ugd/571bad_2020c675e24a4e8eb5c6e7e025fffe8c.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/tuzamada/xosigunevisabebun.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f461.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF461	5304 bytes
SHA-256: `0bf9371da4c543c404efeb44bfcf9bbfefe914dce4d4c64819737941bd32640f`
`font_01_sfnt_off00010679.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10679	13960 bytes
SHA-256: `3fbc429ea569a7393062ef03a5b6c66d5da54cf9c9cecebe58ac875ee0e60445`
`font_02_sfnt_off000132dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x132DD	16152 bytes
SHA-256: `eb61d69085ca5160481e13782cac8986c83f319dc37a5d451b1e346792116e8a`

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