PDF malware analysis — malicious · 23fa0f8a4170dd6a

MALICIOUS

PDF

101.6 KB Created: 2021-01-04 17:50:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31

MD5: cb247c0609a1d4b92a381f38691af04d SHA-1: edd86bfff87e0a976a883b793ec32f54752bfae5 SHA-256: 23fa0f8a4170dd6a232ac3410fe97a0eee0d261442446dbaf0aecc45604f8592

212 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, including one pointing to a known malicious redirector. The heuristic firings indicate this PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier also flagged this PDF with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.8545

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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://traffine.ru/aws?utm_term=metal+gear+solid+5+ost In PDF document text
- https://nizegefubazada.weebly.com/uploads/1/3/4/8/134872151/2221957.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4481052/normal_5fecae1a205aa.pdfIn PDF document text
- https://wenajatimox.weebly.com/uploads/1/3/4/4/134480159/975231.pdfIn PDF document text
- https://lowarimubabop.weebly.com/uploads/1/3/4/7/134712264/zurufisedelus.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365582/normal_5f920f6c5dda2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366384/normal_5f9c14a0d41df.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369782/normal_5f8afa2a1a703.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420756/normal_5f9627f6df4c4.pdfIn PDF document text
- https://guvepilafofifiv.weebly.com/uploads/1/3/4/6/134682232/5885827.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/rezugekolaba/3d_bed_sheets_snapdeal.pdfIn PDF document text
- https://s3.amazonaws.com/kuboki/c_program_for_bisection_method.pdfIn PDF document text
- https://s3.amazonaws.com/zirojopemup/51622876189.pdfIn 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
`stream_005_off00017b24.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x17B24	10424 bytes
SHA-256: `c0a57ec1b9463315e6cc3b9d13b387b9b2426b1069a6a636e384192860a01fa5`
`font_00_sfnt_off0001543d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1543D	6316 bytes
SHA-256: `ad013783156c84b9e79591a16e838423be0c150873caf975450222e971b4ecad`
`font_01_sfnt_off000169a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x169A6	5120 bytes
SHA-256: `c5af6b27b44a19a53f30f62b6ade2d0e56e6d01ac26872fd73559c52ce069a32`

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