Malicious PDF — malware analysis report

Static analysis result for SHA-256 388e746e8a981edf…

MALICIOUS

PDF

73.8 KB Created: 2020-12-28 22:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9e9e5dc85fe9738c91eb356e4ac8a67a SHA-1: c46b9d937d51923a465baf2c4aa60b805890e692 SHA-256: 388e746e8a981edf1ce7b14b5683c01f8867a5e84fcb8221440bb0180301e26e
222 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the extensive link farm suggests a coordinated effort to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/123?utm_term=at440mlb+vs+vm540ml In PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/c59ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374199/normal_5fa6baff38693.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415936/normal_5fd795f167258.pdfIn PDF document text
    • https://numilobes.weebly.com/uploads/1/3/4/2/134235742/1d0c7f8beae84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383160/normal_5fb29c7374fa7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416496/normal_5fe03cc1bcb0b.pdfIn PDF document text
    • https://gegadibiliwo.weebly.com/uploads/1/3/1/8/131871883/1054384.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391024/normal_5f9803dc8ea34.pdfIn PDF document text
    • https://rajuvafawomok.weebly.com/uploads/1/3/4/4/134455823/1682110.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/webipejonavuv/bootstrap_4_testimonial_slider.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/togagu.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/justice_league_123movies_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/99112781612.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_off0000e539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE539 5068 bytes
SHA-256: 213687fd662fdabec25d840935701326757f2c24a0d74b1b3645cee4556743f9
font_01_sfnt_off0000f67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67B 10444 bytes
SHA-256: ebf7a837cd1feab8d50ba4eee44baae51fe9ea025190a2d5c8f387b1a51cc841

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