Malicious PDF — malware analysis report

Static analysis result for SHA-256 def87c55e1548948…

MALICIOUS

PDF

69.5 KB Created: 2021-04-10 08:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4b1ad871d7dc7fce4918ff76ef98cb9 SHA-1: 27a3697d393dda509c84e8695828712f28b3eca1 SHA-256: def87c55e1548948ab2527c047841476ec9bd5135ac519f785990ae9df23b2fb
126 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, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains references to 'Moana soundtrack download zip', suggesting a social engineering lure. The presence of numerous embedded URLs, many pointing to potentially compromised or malicious domains, further supports the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://pilgrimland.com/sites/default/files/webform/resume-uploads/mikax.pdf
    • http://seiary.com/sites/default/files/webform/rec/jizexatunurometubukos.pdf
    • https://www.pharoxglobal.com/sites/default/files/webform/70645978292.pdf
    • https://www.jsif.org/sites/default/files/webform/54250685962.pdf
    • https://ambrose.edu/sites/default/files/webform/kubuxodadiwozubak.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/55178968397.pdf
    • https://web.liderpapel.com/sites/default/files/webform/xikamiwaboloz.pdf
    • https://aboss.by/sites/default/files/webform/zivexovoburowunaxomenip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=moana+soundtrack+download+zip
    • https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/kizoromafogikigogusebef.pdf
    • https://gradfutures.princeton.edu/system/files/webform/42179508969.pdf
    • https://thesanfordschool.asu.edu/sites/default/files/webform/63066688876.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d18e.bin
3968f5a26c386283e096b1a6ae1255797cf4357aba1389417a52faaf7e5dfb58
pdf-font-stream PDF embedded font (sfnt) at offset 0xD18E 5280 bytes
font_01_sfnt_off0000e3ba.bin
e17d896d9de46a055ab04b8e135e487907673a6658aa83e609ce467f6b926f04
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BA 11112 bytes