Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c2a5c869a6b890…

MALICIOUS

PDF

68.2 KB Created: 2020-12-17 02:11:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 82984ee089f1ef39acf0e35ca479bb73 SHA-1: 75483cdf977be1d197d53644a050e44de9377a2c SHA-256: e9c2a5c869a6b890df9fe3735d14eee75df4a0f50d561d1ee36a9af4467385b0
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector. The document body, though truncated, suggests an attempt to disguise malicious content as educational material. The presence of multiple PDF links and a critical heuristic firing for a malicious redirector indicate a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://cctraff.ru/aws?utm_term=math+fact+fluency+worksheets+3rd+grade In PDF document text
    • https://cdn-cms.f-static.net/uploads/4464724/normal_5faf45c268456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372980/normal_5f8fb3febd3cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482219/normal_5fda9826db54d.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/3381818.pdfIn PDF document text
    • https://wubinuju.weebly.com/uploads/1/3/4/6/134642725/7aa7205e1e7b.pdfIn PDF document text
    • https://valodoxajub.weebly.com/uploads/1/3/4/4/134435871/mobamipeveru_tutavuvoxorobe_serudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383688/normal_5fc0b0abc7302.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/kavitokolezub/2951385876.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/37173754564.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/91675305113.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6973cbd14ff0dd2c3fa9e/t/5fd15cdb5e090321caa4bfe3/1607556316918/zig_zag_pattern_friendship_bracelet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b6c78787e8798971b212/t/5fc28a5c3c6ccf69f3b0ccf9/1606584925974/xobixenizukivefavufosa.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/2570416028.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54d583398ff75154af26b/t/5fc80c23ee7ca3754e3492b7/1606945829298/lofozaridejulevofumilasi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ced5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED5 5708 bytes
SHA-256: e0e132f974afeb01cfbba44c23732c5f036703b878ec6622159cf83235113021
font_01_sfnt_off0000e269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE269 9928 bytes
SHA-256: f7c95436839cdfe39618e178e6cca97d85ccfd1af5218392c59babead91abf03

Open this report in the interactive analyzer, or submit your own file for analysis.