Malicious PDF — malware analysis report

Static analysis result for SHA-256 51000b5c8c0d98ba…

MALICIOUS

PDF

69.4 KB Created: 2021-01-12 10:20:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5ea0310321ca724e5d87d7a019a95d95 SHA-1: 7bc1bb576ef023d702ff3b806cd459d3bcdfb117 SHA-256: 51000b5c8c0d98ba5133ecb6153e4443d4eb49964e72871950614e108d1dbc3b
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the sheer volume of links and the presence of a known malicious redirector suggest an attempt to lead users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/123?utm_term=crow+wing+county+jail+phone+number In PDF document text
    • https://cdn.sqhk.co/puvubuzu/xhhVii7/68041689808.pdfIn PDF document text
    • https://cdn.sqhk.co/waxigapo/gcnbbib/judgement_night_twilight_zone.pdfIn PDF document text
    • https://cdn.sqhk.co/pidagasew/fjbjjB7/80438329914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444366/normal_5fa8e4740d61c.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/kujidolotulirek.pdfIn PDF document text
    • https://site-1171656.mozfiles.com/files/1171656/dragon_warrior_monsters_gbc_cheat_codes.pdfIn PDF document text
    • https://kokarino.weebly.com/uploads/1/3/5/2/135299240/67aa1f787a1d5a.pdfIn PDF document text
    • https://webapifupa.weebly.com/uploads/1/3/4/7/134706955/marez.pdfIn PDF document text
    • https://bubokadorododu.weebly.com/uploads/1/3/4/7/134758236/garopolum.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/forupokisip/aaru_songs_tamil_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/burugufomix.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/wurinizabag.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/23968079436.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/create_bitmap_from_drawable_image_android.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_off0000d3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B2 5484 bytes
SHA-256: 2a049cfabeb79c58bb7a6a77b018b9e3afd00946bfa2154a3dd8df587d69b34c
font_01_sfnt_off0000e64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64A 10236 bytes
SHA-256: 637b83e17bc76306733ef4b26dff636d80d688e140a321f4c57568157c540654

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