Malicious PDF — malware analysis report

Static analysis result for SHA-256 15bd54f502dde2a4…

MALICIOUS

PDF

72.9 KB Created: 2021-02-23 10:19:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e1b35d21b9d919e41620082652c32ab6 SHA-1: 34b95f7e33f4179f9a5f3ff0ce23f1e8e45d355e SHA-256: 15bd54f502dde2a4cd33ec7c646cf31e9dfd80a2159233451a9b14fa1413ae3d
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a redirector to malicious infrastructure. The ClamAV detection and ML classifier further support its malicious nature. The document body, though heavily obfuscated, appears to be a lure related to a 'guide book PDF', intended to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://crophysi.ru/wix?keyword=breath+of+the+wild+guide+book+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4499329/normal_5feb7cf784b79.pdfIn PDF document text
    • https://kuburabet.weebly.com/uploads/1/3/4/3/134362545/6761436.pdfIn PDF document text
    • http://picsonair.com/317052921703i8mm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5fe7e273c57a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485296/normal_5fcef638d725e.pdfIn PDF document text
    • http://8gusevshop.space/segmentacion_de_mercado_philip_kotlerhokl1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449014/normal_5fdbd308c3ad7.pdfIn PDF document text
    • https://movimuwetimegi.weebly.com/uploads/1/3/4/3/134342740/zixapuzurakipi-padozosokubiv-xofowipesu-golovago.pdfIn PDF document text
    • http://closemaze.com/the_smallest_city_on_earthdts19.pdfIn PDF document text
    • http://korsabarca.com/kantr_strayk_1._6_indirvy1if.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498404/normal_5feb3d76df1fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453105/normal_5ffa1f1ad77d1.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
    • https://s3.amazonaws.com/lixuzo/status_songs_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/jukujujubapujujez.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_off0000d282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD282 5244 bytes
SHA-256: bcc3bb983dd107a52d3a7a7d9ccce00150c248cd78d3ad9dd97b9690625acd04
font_01_sfnt_off0000e483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE483 10516 bytes
SHA-256: e9d8ed5623acf0bfa64b69e4005a0b0d9ec6e31d1f4f70cbdc4168c2e4fe2a61
font_02_sfnt_off00010882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10882 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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