Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0b4259e5d30938…

MALICIOUS

PDF

73.3 KB Created: 2021-01-20 20:45:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ff1472795fe1b1754b6abcde8a541d48 SHA-1: 93f3a21fc947f43cdd7c32c6408f59dea21faa59 SHA-256: 9a0b4259e5d309386abbacaf5de03a25c036a1e11921d8df2c84e10869710e6b
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://crophysi.ru/wb?keyword=asia%20bird%20list In PDF document text
    • https://zanasebumafuwaj.weebly.com/uploads/1/3/4/8/134899829/bff51.pdfIn PDF document text
    • http://xuvaguwanolinu.66ghz.com/create_form_in_word_template.pdfIn PDF document text
    • https://site-1245874.mozfiles.com/files/1245874/koruruxesevoxunevebola.pdfIn PDF document text
    • https://sudegefaxir.weebly.com/uploads/1/3/5/3/135323135/zexitararulap_xebokar_kalalokun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413703/normal_6005b66043fbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499622/normal_5fcd351f2d070.pdfIn PDF document text
    • https://fefugenaxidoseb.weebly.com/uploads/1/3/1/3/131380158/mebufu-gesojaba.pdfIn PDF document text
    • https://site-1168222.mozfiles.com/files/1168222/principles_of_management_classroom_activities.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474992/normal_5fea247b16e59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406777/normal_5ffe1a2628d62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377100/normal_5f922b29516fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5fe70dd92f431.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://guwivuvasexi.epizy.com/vimajozuporavak.pdfIn PDF document text
    • http://xatudoxi.epizy.com/finemo.pdfIn PDF document text
    • http://bamasagure.epizy.com/9th_grade_math_lesson_plan.pdfIn PDF document text
    • http://kazigolukujo.epizy.com/booklet_template_pages.pdfIn PDF document text
    • http://sogaviwezed.rf.gd/97705569589.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_off0000d82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82F 4400 bytes
SHA-256: d7fae75f81fab85934b57b32873171c09ff4ea0967e8baa0ac108935799c59f9
font_01_sfnt_off0000e715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE715 10284 bytes
SHA-256: 669c55d4913ff60e8f6e3b9f9a1d7be7fde5a268d3712e09e99f8393ad7d3804
font_02_sfnt_off00010a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A28 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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