Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d7fd03579817ac…

MALICIOUS

PDF

103.9 KB Created: 2021-03-20 15:16:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5775c89de979044addf94962100d88d7 SHA-1: a06aa7b49a4cd787ed14adf1850ff3cb91a768db SHA-256: 14d7fd03579817ac2d06560c10274f0ebc9790716c779f03c970004fc4720fca
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to PDF conversion tools, which is a common tactic for phishing or malware distribution. The presence of numerous URLs indicates an attempt to redirect the user to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://zajinet.ru/award?keyword=pdf+to+word+app+android PDF link annotation
    • https://wotopegajoxife.weebly.com/uploads/1/3/4/0/134042499/kenarudekemepobivezi.pdfIn PDF document text
    • https://fiwirozubaxezu.weebly.com/uploads/1/3/4/6/134659856/danonegejodepaled.pdfIn PDF document text
    • https://cdn.sqhk.co/vurifozi/wAihfib/37989244545.pdfIn PDF document text
    • https://cdn.sqhk.co/wazuvegox/Nj4hgPt/sheltered_instruction_define.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwoxegolewa/hilxkhc/xibedivaxozixalot.pdfIn PDF document text
    • http://mojoliziriba.22web.org/68142134145.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://laganomezavarof.epizy.com/facebook_profile_template_maker.pdfIn PDF document text
    • http://govezijatin.rf.gd/jamofekamuw.pdfIn PDF document text
    • http://wujasulo.epizy.com/59450793298.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/kegijefavejasuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef6fd5fd-fbf3-4c12-b9d8-0311e3d43f6e/65191793240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ca55f8-a2d2-4154-869d-38905d24ae87/what_defines_a_viking.pdfIn PDF document text
    • http://gigemubirovivo.epizy.com/wepufuzeralu.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/sokusela.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00014f0b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14F0B 30456 bytes
SHA-256: 9f5393e4c016fd44f8b3385de89774e545dc510125773dde355907b37278d93f
font_00_sfnt_off00010ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE2 3364 bytes
SHA-256: f3e2fd5cfa26a2f7993ea5233d2b55a2f60604e919d058735c2a4e9f9378ad5e
font_01_sfnt_off000118e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E7 4588 bytes
SHA-256: 57642783301de103242ec205741956ed0777e1a955997a315141c85955c5fd3e
font_02_sfnt_off0001288c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1288C 11176 bytes
SHA-256: ff492002aabcd3dc64ad67b8fbce6fdbcd430d3ca24b50fe388d9fa7e26e25da
font_04_sfnt_off000183f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183F0 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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