PDF malware analysis — malicious · 63486c556c61aa97

MALICIOUS

PDF

92.6 KB Created: 2021-03-23 17:36:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: db567159bc4c8ff777a344eefff68efe SHA-1: 0883807a3e771f28581dfa065a0d39b2e730c46d SHA-256: 63486c556c61aa97d08d34225d3a706ea1713f2d942c11b5b45e6c8d93e0cb75

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a large number of links on disposable hosting, suggesting a link farm designed to redirect users. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection as phishing strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://soxebez.ru/strik?utm_term=biblia+de+estudio+reina+valera+1960+online PDF link annotation
- https://cdn-cms.f-static.net/uploads/4465548/normal_60590de1e5bb4.pdfIn PDF document text
- http://jususozosowi.22web.org/77525249803.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4496381/normal_6047c161016b3.pdfIn PDF document text
- http://verifiedbadge-lnstagram.com/powisiraf3p6p.pdfIn PDF document text
- http://sujonavisemasi.22web.org/mewetex.pdfIn PDF document text
- http://secureappeal.com/dudasexiniotgx.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4365555/normal_5ffa1840c44b4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374682/normal_60461db5583e8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448744/normal_5fe934831c273.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4470961/normal_5fcf66cfec147.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370778/normal_603824f755d61.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4494893/normal_6003fd8834a1b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4476421/normal_5ffe6643e5fbc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413697/normal_603b16530b419.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416660/normal_604a6aa440788.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420230/normal_603cfa07153e5.pdfIn PDF document text
- http://vbnmcxz.xyz/winifabejodudofujadunimuppxg81.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
- http://kawozubugomolen.epizy.com/why_is_my_weight_watchers_scale_not_working.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6e9d9632-f8af-462b-884f-b860ba0739ad/xeduno.pdfIn PDF document text
- http://dunudorawexuva.rf.gd/39844992037.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c451716b-e223-44d9-8bc5-eb565da80f87/what_type_of_oil_does_a_predator_4000_generator_use.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6f32a20d-b24e-4372-8a04-c97d8c629e17/how_to_use_a_dual_power_carpet_cleaner.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00011c4c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C4C	5456 bytes
SHA-256: `2a57848acb051a369cecbd8d16ff628b2ddc16f6eacede2d2db12aa0553c5d79`
`font_01_sfnt_off00012ed8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12ED8	11692 bytes
SHA-256: `9aee3565b0ce455f02f931b78b3137717238a4e349d1b5594806bb2d0804219d`
`font_02_sfnt_off000154e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x154E1	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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