Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef567ef0f1f43e0…

MALICIOUS

PDF

87.2 KB Created: 2021-02-22 17:36:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 9261015e5edee2060bb7588f601a6213 SHA-1: 4996de476b010592d0e346390f319e6f91678767 SHA-256: 5ef567ef0f1f43e00e39020b6fdc44be81d52c4e7052be1c30ac52d80f0490ab
264 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to known malicious redirector infrastructure or disposable hosting. The document body, though heavily obfuscated, contains text related to 'Kawasaki mower engine parts Australia', suggesting a lure to attract users interested in specific products. The presence of multiple PDF links and a critical heuristic firing for a malicious redirector link indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://crophysi.ru/strik?utm_term=kawasaki+mower+engine+parts+australia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4466367/normal_5fd24d7ba14f4.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/hegc07b/lubanafomoxora.pdfIn PDF document text
    • http://jufobimagif.iblogger.org/48460474523.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/cBYjiW1/idle_mind_expression.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418178/normal_602c33eae2a0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5fd0d712b8be3.pdfIn PDF document text
    • https://lotekovikerux.weebly.com/uploads/1/3/1/3/131398560/zifibiwuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427094/normal_6004317c51a61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490523/normal_60219caa5f9cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485321/normal_5ff7f855d34a9.pdfIn PDF document text
    • https://febadezupuwile.weebly.com/uploads/1/3/1/0/131071278/4419027.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/6hb6ibu/85385330549.pdfIn PDF document text
    • https://juzuxadubibipa.weebly.com/uploads/1/3/4/6/134685448/burofowiton.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476596/normal_6027c7d531406.pdfIn PDF document text
    • https://maritomumotoko.weebly.com/uploads/1/3/4/5/134512683/jokajelurofovuxo.pdfIn PDF document text
    • http://xawikeroteguvu.iblogger.org/calendar_date_photoshop_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/remeranexe/dajekisanakarijatis.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/dirufegenurirodir.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E0 3384 bytes
SHA-256: a08f1a674a89c721a719dd512874d6193912e6301228cada6bac5be4cd5f95e0
font_01_sfnt_off00010ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF4 5264 bytes
SHA-256: 910354e72115abf0a0243d6580e34f0f761a5524c3dd57585717f9c8b8e49f53
font_02_sfnt_off000121dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DC 13896 bytes
SHA-256: 943ec3019300fed58b94138207e9489e952e55951bab518aee8f6ddbf3f5040e