PDF malware analysis — malicious · cb2dd54c012ca6b3

MALICIOUS

PDF

67.6 KB Created: 2021-01-06 10:29:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 4d8e96feab82b6a66e9b2c05ff2e77b1 SHA-1: 4637060fe90b025aaae411eb110c5b68dfc47262 SHA-256: cb2dd54c012ca6b3907ee3734d4db3fd18713f4dc23b984a3dbf7cd25fbf4606

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO abuse tactic. One of the embedded URLs, 'https://trafftec.ru/aws?utm_term=goodwill+pricing+guide+for+donations', is likely part of a phishing or scam campaign. The ClamAV detection and ML classifier further support its malicious nature, indicating it is likely a phishing or trojan distribution vehicle.

Machine Learning

Nyx PDF Classifier malicious score 0.9959

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
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://trafftec.ru/aws?utm_term=goodwill+pricing+guide+for+donations PDF link annotation
- https://cdn-cms.f-static.net/uploads/4370092/normal_5fa3a307474e4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4466680/normal_5fdc010d33e4c.pdfIn PDF document text
- https://cdn.sqhk.co/vumivatuvi/tLhcajb/pumirafikunepojirez.pdfIn PDF document text
- https://sanokigoj.weebly.com/uploads/1/3/4/8/134863934/6765078.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413244/normal_5f9624363e76c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376869/normal_5fbf405795a5c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385427/normal_5fb5e7c87933e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393022/normal_5fe88e9a024ab.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408703/normal_5f979e51e4b59.pdfIn PDF document text
- https://cdn.sqhk.co/fadanade/gcBidii/jisozufilelitu.pdfIn PDF document text
- https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/8440218.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/zeworibuzoza/bakeribikivegetewis.pdfIn PDF document text
- https://s3.amazonaws.com/wixatax/zimazabumiruwesa.pdfIn PDF document text
- https://s3.amazonaws.com/fipijife/jofuradalokojewarebama.pdfIn PDF document text
- https://s3.amazonaws.com/legapatatezisa/jasetej.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/05b9e240-987a-4c41-bdfb-4152db565bd8/pobujese.pdfIn PDF document text
- https://s3.amazonaws.com/nilafafakem/excel_user_defined_worksheetfunction.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_off0000d9c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9C9	5448 bytes
SHA-256: `980caa2234990fbfdff173c8fb6611ff76d88dc69c02bba1a8f775e25e12d7fb`
`font_01_sfnt_off0000ec7b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC7B	10396 bytes
SHA-256: `94f029c7f6d1a893de5be0f918743c77c22614dbdfd3e458bb544142356c91f4`

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