PDF malware analysis — malicious · 734ad4c4172c4100

MALICIOUS

PDF

67.2 KB Created: 2021-05-25 01:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 94e39e400d6cf0d1a093b38259f9ef08 SHA-1: bfbdaa74dc8bba07ccf485431929963dbc103c63 SHA-256: 734ad4c4172c41009cb99c36892c2a4ce7b210d70b39919e50472e7afff90864

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9391

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
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
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://baarspo.ru/strik?utm_term=ejercicios+potencias+y+raices+2o+eso+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4384037/normal_5fedbf201c013.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4484383/normal_6058ee7c5341b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369762/normal_605d680e9d081.pdfIn PDF document text
- https://nopiwevupemaro.weebly.com/uploads/1/3/4/6/134653234/2c423296aa.pdfIn PDF document text
- https://wixexiwe.weebly.com/uploads/1/3/5/3/135316610/bepapisigu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4484633/normal_6002d191ddc66.pdfIn PDF document text
- https://sejusidanixaj.weebly.com/uploads/1/3/4/3/134374441/xobifubemulavomesiku.pdfIn PDF document text
- https://kaxamixerev.weebly.com/uploads/1/3/2/7/132712358/97243a12cacd64.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4403429/normal_5fc8c35707d3d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454046/normal_601625cc67a8c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4502563/normal_5fd3350e42aba.pdfIn PDF document text
- https://vexitibivomak.weebly.com/uploads/1/3/0/9/130969710/seluxipijusuj.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4428083/normal_5ff116048ea15.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4410952/normal_5ffe416137b8c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4393204/normal_5fc98821714f4.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/33e5e662-689c-4b85-8624-05233e43d194/44065501911.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5de12689-81aa-43d8-bb39-c3e197305b26/22996346440.pdfIn PDF document text
- https://s3.amazonaws.com/mixanaz/niwubeti.pdfIn PDF document text
- https://s3.amazonaws.com/savukojubusum/pigizadepasevodiwodubige.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ca7d808c-11cd-4006-a10a-8bde6f81bb55/zebra_zp_505_driver_mac.pdfIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ebdb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBDB	3016 bytes
SHA-256: `8fe238d4efa118d1e805f072976fe3c461391de55fefcb4facfc8f71fb735506`
`font_01_sfnt_off0000f696.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF696	5384 bytes
SHA-256: `adf845c190fbac60570c11b8bde3b2f3c63ec770d84d31171869a83e2355f888`

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