Malicious PDF — malware analysis report

Static analysis result for SHA-256 91ea258123b017b7…

MALICIOUS

PDF

79.2 KB Created: 2021-01-19 04:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d853100861d0637dd937eef2b5a26b07 SHA-1: 76b09b64bc6064afe62d7b20b74b8d7601ae1461 SHA-256: 91ea258123b017b7f4c3a4db3e4ac58f23841a8e163f9673c4c362fbd1b99617
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, including those on disposable hosting and with UTM parameters, suggests a phishing or link-farming attack pattern. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/123?utm_term=sahuarita+high+school+phone+number PDF link annotation
    • http://sizegivip.22web.org/36598882253.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487197/normal_5fed7128967c0.pdfIn PDF document text
    • https://site-1168173.mozfiles.com/files/1168173/nosevegati.pdfIn PDF document text
    • https://site-1173807.mozfiles.com/files/1173807/harry_potter_hogwarts_mystery_all_free_energy_locations.pdfIn PDF document text
    • http://zugunef.22web.org/atm_online_form_sbi.pdfIn PDF document text
    • https://site-1173237.mozfiles.com/files/1173237/file_manager_android_2__3.pdfIn PDF document text
    • https://site-1207189.mozfiles.com/files/1207189/joxabunigaxi.pdfIn PDF document text
    • https://site-1245311.mozfiles.com/files/1245311/zofawugavilisogape.pdfIn PDF document text
    • http://juwapes.22web.org/arrow_icon_vector_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5f9a96dd7e306.pdfIn PDF document text
    • http://fiduvizowema.iblogger.org/car_title_transfer_form_minnesota.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408188/normal_5f98ff5cd3f64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370054/normal_5ffbe233bec80.pdfIn PDF document text
    • https://site-1168507.mozfiles.com/files/1168507/cosmos_possible_worlds_blu_ray_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/0Qij1m4/kularizebujedifibedoviwo.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
    • http://gevegure.rf.gd/register_form_template_in_html.pdfIn PDF document text
    • http://muvelexadaw.epizy.com/free_printable_paper_bunting_template.pdfIn PDF document text
    • http://fonenutekosut.epizy.com/rikuzugokinevu.pdfIn PDF document text
    • http://kesufelitam.rf.gd/admission_form_of_ignou_for_ba.pdfIn PDF document text
    • http://bilunijo.epizy.com/quarterly_report_dates.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_off0000ed2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2F 5472 bytes
SHA-256: fe947032be462fcb28c63c0e50ee7904650cc65d268c5b928a53a1246640d4c5
font_01_sfnt_off0000ff8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8F 9716 bytes
SHA-256: f96d72a6241124c7eaa4e31b4c42a12b744b670a0bc8c92f24be581ec644b604
font_02_sfnt_off000120e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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