PDF malware analysis — malicious · b7b36a086fffea3d

MALICIOUS

PDF

61.1 KB Created: 2021-04-27 10:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: f34ae9c844d156f52761c66d5e628dd6 SHA-1: fa5ba0469d39275ea3e700482cd9d336ed7872b1 SHA-256: b7b36a086fffea3d58a52413c9ba5bea4cdef9465f6bc94f29343934c6cae127

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains or are structured as link farms, indicating a likely attempt to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, suggesting the document is designed to manipulate search engine results or distribute links.

Machine Learning

Nyx PDF Classifier malicious score 0.7689

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://www.visitsavannah.com/sites/default/files/webform/71260674720.pdf In PDF document text
- https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/4264017636.pdfIn PDF document text
- https://www.a1touchsolution.nl/sites/default/files/kobovigub.pdfIn PDF document text
- http://pilgrimland.com/sites/default/files/webform/resume-uploads/woluweweketasuzizolog.pdfIn PDF document text
- https://www.blplegal.com/sites/default/files/webform/54305505708.pdfIn PDF document text
- http://www.birdlifebotswana.org.bw/sites/default/files/webform/sightings-sketches/fipeforivu.pdfIn PDF document text
- https://europa-ts.ru/sites/default/files/webform/totikejeropisatuzubafaba.pdfIn PDF document text
- https://ambrose.edu/sites/default/files/webform/kepasibadugemefobovabo.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/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=the+collector+2PDF link annotation
- https://thesanfordschool.asu.edu/sites/default/files/webform/83703622856.pdfIn PDF document text
- https://lib.asu.edu/system/files/webform/53252105934.pdfIn PDF document text
- https://community.princeton.edu/system/files/webform/wijudabopijobomoxusosul.pdfIn PDF document text
- https://minorsoncampus.princeton.edu/system/files/webform/kuwidiloj.pdfIn PDF document text
- https://lib.asu.edu/system/files/webform/delibenapu.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_off0000d328.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD328	4580 bytes
SHA-256: `0d9c665c4c8ac2eb53efc4ed011b3117ad393e15dfa731a6ece35fb9c6627e92`

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