PDF malware analysis — malicious · 9e7f53e9872bf774

MALICIOUS

PDF

72.5 KB Created: 2021-06-07 20:10:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 78f2a025b311016510e65c50188a208c SHA-1: d08c0b256ea680b5831833d97f1ec0b4a6ff3991 SHA-256: 9e7f53e9872bf774327fd8aa4d578017514007d1f80ae83cb787c904fd2440c1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. The PDF contains numerous external links, with a significant number pointing to other PDF files hosted on various platforms, suggesting an attempt to distribute more malicious content or engage in SEO manipulation. While no scripts were explicitly extracted, the presence of embedded URIs and the overall structure strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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 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.
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://huntic.ru/pbw?utm_term=minna+no+nihongo+1+pdf+free+download PDF link annotation
- https://static.s123-cdn-static.com/uploads/4475988/normal_600084d2a6bf9.pdfIn PDF document text
- https://juvafize.weebly.com/uploads/1/3/7/5/137516136/82f6f1d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4423700/normal_604deb39238d8.pdfIn PDF document text
- https://gajanokavas.weebly.com/uploads/1/3/4/6/134614817/sejutafeki.pdfIn PDF document text
- https://fawiwusum.weebly.com/uploads/1/3/1/6/131637021/zigekabepub-wisusozidaj.pdfIn PDF document text
- https://detazemunowovi.weebly.com/uploads/1/3/4/7/134704720/9487348.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4500893/normal_5ff498857aa4f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4485821/normal_5fc69de620a6d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379842/normal_5fd5fb6c89a7c.pdfIn PDF document text
- https://tiwabegi.weebly.com/uploads/1/3/0/8/130874513/2795561.pdfIn PDF document text
- https://ziziwatir.weebly.com/uploads/1/3/4/7/134713039/3689022.pdfIn PDF document text
- https://nadarikiwuxat.weebly.com/uploads/1/3/2/7/132712530/bovasinifosavaw-jixewawusozo-vosokugufi-posusurufe.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4384026/normal_5ff84aa56d122.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4506170/normal_5fcd71d5ab8a8.pdfIn PDF document text
- https://daxugukixirujin.weebly.com/uploads/1/3/4/7/134739014/d7c7de842c.pdfIn PDF document text
- https://zafapeniledepur.weebly.com/uploads/1/3/4/8/134846756/1225957.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4500904/normal_5ff00fb6894e0.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://nukuxim.pbworks.com/f/how_to_minecraft_windows_10_edition_for_free.pdfIn PDF document text
- http://jesababa.pbworks.com/w/file/fetch/144413985/taminegavowejunoj.pdfIn PDF document text
- http://gabumur.pbworks.com/f/how_to_set_up_cat_eye_velo_7.pdfIn PDF document text
- http://lifelekufa.pbworks.com/f/pavidovosiwujopizasobagig.pdfIn PDF document text
- http://rabopadob.pbworks.com/w/file/fetch/144584601/81098678459.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_off0000d26b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD26B	4980 bytes
SHA-256: `935649dc3a7985500c9466e89d90d57ecbd3aaef38bd88cbb534e85b93ab4db8`
`font_01_sfnt_off0000e366.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE366	10232 bytes
SHA-256: `aadbda04db289c451db7fff6035efbc8fe36eb4b7a9813303aaa29d79d00ad18`
`font_02_sfnt_off00010673.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10673	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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