PDF malware analysis — malicious · 984151528d2332fd

MALICIOUS

PDF

58.4 KB Created: 2021-04-11 02:37:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 1487f59d2cf639a543c22691903e7b9a SHA-1: ad4988b5539f2c765f42035995a75f95a5ac6970 SHA-256: 984151528d2332fddc1b28d62e5ed80fb9a086cef1f739d26decc0f9aa613f6c

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards techniques used to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9637

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://natsihwa.org.au/sites/default/files/webform/degajakuko.pdf In PDF document text
- http://cicatsalud.com/html/sites/default/files/webform/604022749.pdfIn PDF document text
- https://ambrose.edu/sites/default/files/webform/61928937085.pdfIn PDF document text
- http://www.muttypawsacademy.com/sites/default/files/webform/vaccines/37570077738.pdfIn PDF document text
- https://ambrose.edu/sites/default/files/webform/21691652676.pdfIn PDF document text
- https://www.a1touchsolution.nl/sites/default/files/26511902049.pdfIn PDF document text
- https://ambrose.edu/sites/default/files/webform/58588935603.pdfIn PDF document text
- https://ambrose.edu/sites/default/files/webform/natogaj.pdfIn PDF document text
- https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/13471650610.pdfIn PDF document text
- https://europa-ts.ru/sites/default/files/webform/81905598419.pdfIn PDF document text
- https://www.newburghgroup.com/sites/default/files/webform/resumes/falaburisidibiwad.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=ali+%25C5%259Feriati+kitaplar%25C4%25B1PDF link annotation
- https://ec.europa.eu/eip/agriculture/sites/default/files/webform/5272012193.pdfIn PDF document text
- https://www.ice.cam.ac.uk/sites/www.ice.cam.ac.uk/files/webform/wosevojowavinojefe.pdfIn PDF document text
- https://www.healthdata.org/sites/default/files/resumes/58023923203.pdfIn PDF document text
- https://thesanfordschool.asu.edu/sites/default/files/webform/85266863194.pdfIn PDF document text
- https://www.healthdata.org/sites/default/files/resumes/sametuzovu.pdfIn PDF document text
- https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/52983615418.pdfIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ccd1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCCD1	4968 bytes
SHA-256: `036344d07e0fb598352331ea2b1a6f6468d7df976ff9e0ebe073f33dbf3f0599`

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