PDF malware analysis — malicious · 0d3f4186abe46c56

MALICIOUS

PDF

46.6 KB Authoring application: Pdftk First seen: 2021-09-14

MD5: 4ac0adb0c4a8c8b382a18bf1633b5a38 SHA-1: 21e9f941164ac36716864619d2cb5a89ca905b95 SHA-256: 0d3f4186abe46c56c1878afa77d8dfcd49b0df6436797a62bda0cf8626dc4bad

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files hosted on Weebly, a technique often used for SEO spam or to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or content distribution attack.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
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.
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://rokukuzakukol.weebly.com/uploads/1/3/0/4/130489398/9815377.pdf In PDF document text
- https://nukijofifokij.weebly.com/uploads/1/3/0/4/130436458/nosafepeleruku.pdfIn PDF document text
- https://liweriwaduvu.weebly.com/uploads/1/3/0/5/130543264/b9a6d07f1572ca8.pdfIn PDF document text
- https://xebunuwewar.weebly.com/uploads/1/3/0/4/130488396/kidamitubuj-xabogubef-jixiz.pdfIn PDF document text
- https://buxupojiko.weebly.com/uploads/1/3/0/4/130436050/f13440acb7.pdfIn PDF document text
- https://biguxujupivew.weebly.com/uploads/1/3/0/5/130545097/6306356.pdfIn PDF document text
- https://wulelixinogep.weebly.com/uploads/1/3/0/2/130291724/3929552.pdfIn PDF document text
- https://duferegateboja.weebly.com/uploads/1/3/0/4/130489776/b733ac40a3c.pdfIn PDF document text
- https://buzamejuti.weebly.com/uploads/1/3/0/4/130475990/binegipeju.pdfIn PDF document text
- https://womiwide.weebly.com/uploads/1/3/0/2/130287521/3265356.pdfIn PDF document text
- https://tezorabe.weebly.com/uploads/1/3/0/2/130270738/2455046.pdfIn PDF document text
- https://velubulixitaxus.weebly.com/uploads/1/3/0/3/130323213/4077561.pdfIn PDF document text
- https://pebulerudegezoz.weebly.com/uploads/1/3/0/3/130324192/fikorezikasoxojobu.pdfIn PDF document text
- https://resazagerowa.weebly.com/uploads/1/3/0/4/130489157/130489157.html#explain+iron+iron+carbide+phase+diagramIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000135d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x135D	8668 bytes
SHA-256: `91af6ee6233d03aa72fc41a5138a31db4558cc0d21cb4c6b4d4fb9db8421bb98`
`font_01_sfnt_off00007960.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7960	3220 bytes
SHA-256: `cd0e1e9f1ea242b8023acb85485a89a28aae911cdf8db92b983d12ba9244e320`

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