Malicious PDF — malware analysis report

Static analysis result for SHA-256 4658e0e117c354ad…

MALICIOUS

PDF

41.9 KB Created: 2020-10-15 08:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a5c5e45a845f2599be1d8879a92e08c6 SHA-1: 2603ae0f17d5e8e51beb94fe4455f6407cee4b6b SHA-256: 4658e0e117c354adef233d85f4882d73aad7c14795a7658ad34337ed2a05cdf7
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches one of the extracted IOCs. The presence of multiple disposable hosting links suggests a link farm designed to obscure the ultimate destination, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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.
  • 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://ggtraff.ru/strik?keyword=corporate+governance+and+strategic+management+pdf In PDF document text
    • https://site-1037192.mozfiles.com/files/1037192/9947617802.pdfIn PDF document text
    • https://site-1039273.mozfiles.com/files/1039273/gapoleboxudogepenugamega.pdfIn PDF document text
    • https://site-1037141.mozfiles.com/files/1037141/nukogatetaziwarinol.pdfIn PDF document text
    • https://site-1043297.mozfiles.com/files/1043297/wumenumuworagogegitotam.pdfIn PDF document text
    • https://site-1041395.mozfiles.com/files/1041395/93429973688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f871a55dc619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5f87cd9ec4ccd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f873efc78abd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_5f87b26da0255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f8716d54a1a9.pdfIn PDF document text
    • https://site-1037835.mozfiles.com/files/1037835/45290833548.pdfIn PDF document text
    • https://site-1039465.mozfiles.com/files/1039465/siribebutuvasunawukika.pdfIn PDF document text
    • https://site-1039903.mozfiles.com/files/1039903/zezabajomorukezipowaxod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/164f06ff-fe6f-4870-b288-946d74b084e2/33607998463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e235cf86-a8af-4ca9-b38a-b4235d9486ac/38666420767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d9fd1ff-d876-4fe9-bce6-02f1ab460cb0/todidupetilovefaxof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9270bc05-4ecd-4aeb-95fb-b656916c91c6/61895647651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c6098b-8a35-4e7b-b571-fd146681205b/robukako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98430a81-3c69-4dcf-9eb1-02364b767a35/49840958539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a9d909-927b-41c4-8005-858ed607f135/wukugitiduzusagub.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_off000065e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E3 5408 bytes
SHA-256: 389d3aefc198cbd2469714d8ef4e2a93416eab79ad725731250e2f939d555294
font_01_sfnt_off0000783b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x783B 10012 bytes
SHA-256: 76f38caa6c0f953a73ff9ba2a65e8da7647759faedcc2fe187e78edd9ccaddbe

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