PDF malware analysis — malicious · 055d88c86dcd26d2

MALICIOUS

PDF

66.6 KB Created: 2021-04-14 07:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d5e04c6118e0e880e7773fcabb48a468 SHA-1: 1372acb5e5864bbbac250ef19f81df22ffc291a2 SHA-256: 055d88c86dcd26d296e4c3c73b0fed793868ffac1a27403ca0116de3dc6fb164

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs and a link farm heuristic indicates an attempt to redirect users to potentially malicious sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit users through deceptive links, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9817

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://ambrose.edu/sites/default/files/webform/lajeriz.pdf
- https://www.natsihwa.org.au/sites/default/files/webform/tesogiruzan.pdf
- https://www.jwico.com/sites/default/files/webform/47965191786.pdf
- https://www.ofalloncasting.com/sites/default/files/webform/tasuwagorefovufozibojer.pdf
- https://www.dgs-interparts.be/sites/default/files/60165950635.pdf
- https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/niroxopewesanusogub.pdf
- https://www.jwico.com/sites/default/files/webform/monufugabezexi.pdf
- https://www.telluridescience.org/sites/default/files/tstc-applications/fezijorimofilafomifum.pdf
- https://www.woonsocketri.org/system/temporary/webform/54194604641.pdf
- https://www.newburghgroup.com/sites/default/files/webform/resumes/41319995155.pdf
- https://www.enwidth.com/sites/default/files/webform/resumes/palepipob.pdf
- https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/vonasajevevedatenalezeb.pdf
- https://www.a1touchsolution.nl/sites/default/files/rowiduw.pdf
- http://www.guninetwork.org/system/files/webform/heirri_proposals/80098342864.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=el+viraje+de+la+filosofia+moritz+schlick
- https://campusrec.princeton.edu/system/files/webform/93394875634.pdf
- https://lib.asu.edu/system/files/webform/61431168480.pdf
- https://www.healthdata.org/sites/default/files/resumes/fanonexujezurexuli.pdf
- http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f8f5.bin` `809a8458c76676f5b56bdd78226907847e8a6e2b04b7ed7eae4fd88fe8db4230`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8F5	5152 bytes

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