Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00e2cc6ab580d75…

MALICIOUS

PDF

94.1 KB Created: 2021-04-16 11:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78358f01d8256830bf256d3e1e31dd48 SHA-1: 48a6793b63fea85ddb10441dfd10fbbb522f9ba7 SHA-256: e00e2cc6ab580d75d3edcd6e964f1b2325b4e5d69f66800a1bfa55f65ca5c9e7
124 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, with one pointing to 'portal-mysigma.com', which is also identified as a link farm. The document body, though heavily obfuscated, suggests a lure related to 'auto clicker' software, likely intended to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8073

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 http://portal-mysigma.com/system/files/student-proof/wofofokarawivuboniju.pdf
    • https://aboss.by/sites/default/files/webform/tatesejozamelifat.pdf
    • https://ambrose.edu/sites/default/files/webform/gewematumupam.pdf
    • http://portal-mysigma.com/system/files/student-proof/62332338419.pdf
    • https://ambrose.edu/sites/default/files/webform/82598578892.pdf
    • http://portal-mysigma.com/system/files/student-proof/pifudolaloxafedotodela.pdf
    • http://www.friendlycc.com/sites/default/files/webform/74296331991.pdf
    • https://www.woonsocketri.org/system/temporary/webform/makepepatamizozixijefawop.pdf
    • https://www.jwico.com/sites/default/files/webform/23528315583.pdf
    • https://www.afscme65.org/system/files/webform/rerezuduzolorefa.pdf
    • https://www.mothercare.ro/sites/default/files/webform/resumes/susumijifiwef.pdf
    • https://www.uts.cw/sites/default/files/webform/pugixenarewowu.pdf
    • https://ambrose.edu/sites/default/files/webform/26147793628.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+use+murgee+auto+clicker+for+runescape
    • https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/kizoromafogikigogusebef.pdf
    • https://minorsoncampus.princeton.edu/system/files/webform/janoruzafasolefixos.pdf
    • https://gradfutures.princeton.edu/system/files/webform/pelafo.pdf
    • https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/86402477901.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001618a.bin
680ff9252a7774858a4557ca701cb6ec3a632be5844536707d8c16e4be8fd20a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1618A 5452 bytes

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