Malicious PDF — malware analysis report

Static analysis result for SHA-256 78455c29756e654f…

MALICIOUS

PDF

50.4 KB Authoring application: Poppler-utils
MD5: de1efc995f2ed4f7c788fa1fab60102e SHA-1: 22ea8574f0cabf8c96420ea1ac3ed06b1662af59 SHA-256: 78455c29756e654fb3d4438240686fc40cc47ed1a594dc86e9e69f3cd8afb185
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs, identified as a link farm by heuristics. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or SEO spam. The embedded URLs are the primary indicators of compromise, suggesting the document's purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://numeracyshed.com/uploads/1/3/0/6/130603785/f9fdce0ae0adb.pdf
    • http://mfgm.de/uploads/1/3/0/6/130621675/2420467.pdf
    • http://spotlightchildrenstheater.com/uploads/1/3/0/2/130288661/ximas.pdf
    • http://navslaborers.org/uploads/1/3/0/2/130288642/4722676.pdf
    • http://xebudajo.care-store.ru/uploads/2020/01/28/6618618.pdf
    • http://mojofinancialservices.com/uploads/1/3/0/6/130620478/4850582.pdf
    • http://myroyaltonwedding.com/uploads/1/3/0/6/130605269/tejoxijobe_kafabexufuju_rikunu.pdf
    • http://oakahmochafarms.com/uploads/1/3/0/2/130272649/pewide.pdf
    • http://agslist.com/uploads/1/3/0/3/130379316/92cdc96838f.pdf
    • http://phaemacmin.com/uploads/1/3/0/4/130491703/fegatida_voremazewaxasi_datutof_nujum.pdf
    • http://positivitymagic.net/uploads/1/3/0/7/130776657/a0c4d26ff4e.pdf
    • http://sauerlandhypotheek.nl/uploads/1/3/0/5/130550756/130550756.html#nepali+movie++website+name
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012f9.bin
736c32e5ca45dda6d96af3efa54027a776ab8d1776f316bd83784421ae437a19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9 8640 bytes
font_01_sfnt_off00007c06.bin
ac21b7c830a779d809bda1bd4c70982767798b1925e80d75011386fa5db421f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C06 8924 bytes

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