PDF malware analysis — malicious · f88cca7f5aa518a1

MALICIOUS

PDF

81.0 KB Created: 2021-03-17 13:33:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 90357292b44fff8ca1bd523ed32580b0 SHA-1: 253475b5657641b9f8ed1c4523e6b70b5a0cdc99 SHA-256: f88cca7f5aa518a1443aee253de32d063c834e257b22d5b4916aa9d9dca4cd13

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely for phishing purposes. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 4

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://jumiwimov.ru/123?utm_term=metformin+hcl+vs+metformin
- https://cdn-cms.f-static.net/uploads/4412174/normal_600dff3e787ae.pdf
- https://cdn-cms.f-static.net/uploads/4456728/normal_601853be972fd.pdf
- https://golisarupu.weebly.com/uploads/1/3/5/3/135317681/5cff4133acaf.pdf
- https://masagefila.weebly.com/uploads/1/3/4/5/134505888/fosokidorenu.pdf
- https://cdn.sqhk.co/luwokiseg/jjifgcY/39133301031.pdf
- https://kowenijog.weebly.com/uploads/1/3/4/0/134096242/nirefifuwamu_muvib.pdf
- https://sazotavivi.weebly.com/uploads/1/3/1/1/131164406/553973.pdf
- https://static.s123-cdn-static.com/uploads/4417216/normal_5fc9471018f80.pdf
- http://klosheff.xyz/mujijavonalizoxamuf6wiab.pdf
- https://cdn-cms.f-static.net/uploads/4477630/normal_60302f1e7951e.pdf
- http://navalny.design/fisher-price_infant-to-toddler_rocker_pink_battery9ryyv.pdf
- https://cdn-cms.f-static.net/uploads/4479679/normal_602f2f0260d99.pdf
- http://ctuxuu.com/java_interview_questions_and_answers_on_constructorsncr1v.pdf
- http://jumitom.22web.org/3601041077.pdf
- http://bigowet.xyz/12780986394txfea.pdf
- https://cdn.sqhk.co/sazipuvaxiv/IFv4ihD/43962119815.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://maferodo.epizy.com/jofipe.pdf
- http://wesinud.rf.gd/57028071584.pdf
- http://wanudozadix.rf.gd/84080177731.pdf
- http://mafasegu.epizy.com/lease_agreement_format.pdf
- http://wikilupari.epizy.com/best_sub_at_jersey_mikes_reddit.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001011d.bin` `224fe7f3a26c910d9bf0a77c12f5a13b5100de996c6b870fe2e705ab2c64e2a6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1011D	4976 bytes
`font_01_sfnt_off000111fe.bin` `d772eda2c86a962d9af21b4a9285be788d178c633485b8e8dca80466f650debd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x111FE	10904 bytes

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