PDF malware analysis — malicious · 8e70b327eadfc73d

MALICIOUS

PDF

62.3 KB Created: 2021-04-12 10:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07

MD5: 87f2aae82129f18748016725ea90fdd2 SHA-1: cd15cf7523ab3ed7937073725628206988a9f205 SHA-256: 8e70b327eadfc73d9a8eb57de46860c3fbae99b915bf50ab297ffd48b00dbfbb

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection and ML heuristic indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to lead the user to a compromised or malicious resource.

Machine Learning

Nyx PDF Classifier malicious score 0.8152

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://ambrose.edu/sites/default/files/webform/20598750849.pdf In PDF document text
- https://ambrose.edu/sites/default/files/webform/82598578892.pdfIn PDF document text
- https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/xetomaroronep.pdfIn PDF document text
- https://ambrose.edu/sites/default/files/webform/talizovub.pdfIn PDF document text
- https://www.cdcplumbing.com/sites/default/files/webform/contact-us/sawifujemenolezaf.pdfIn PDF document text
- https://www.natsihwa.org.au/sites/default/files/webform/bukitonixoravutewoluba.pdfIn PDF document text
- http://klm3fg.grhosting.cz/sites/default/files/webform/files/todoxobolukajit.pdfIn PDF document text
- https://ambrose.edu/sites/default/files/webform/61391242106.pdfIn PDF document text
- https://natsihwa.org.au/sites/default/files/webform/kixeje.pdfIn PDF document text
- https://www.jts.org.jo/sites/default/files/webform/76938035167.pdfIn PDF document text
- https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/3563422068.pdfIn PDF document text
- https://www.enwidth.com/sites/default/files/webform/resumes/43403042061.pdfIn PDF document text
- https://architecturaldesigninc.com/sites/default/files/vudezuluxi.pdfIn PDF document text
- http://www.guninetwork.org/system/files/webform/heirri_proposals/dagen.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/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+install+f4se+with+vortexPDF link annotation
- https://www.ice.cam.ac.uk/sites/www.ice.cam.ac.uk/files/webform/50075528518.pdfIn PDF document text
- https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/woragirewun.pdfIn PDF document text
- https://www.healthdata.org/sites/default/files/resumes/mevupuxapiledowitire.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_off0000d105.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD105	5124 bytes
SHA-256: `a3fdbe906a23693ed69e14fa2348666b937e9c8befa126b104d4eeea743e166d`

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