Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3902c5d21fc849…

MALICIOUS

PDF

73.0 KB Created: 2021-02-28 18:30:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 009892f38567f614457837f40414d8f5 SHA-1: 67007840c67914aff01ec4c1c78ca6bfe74ef536 SHA-256: 9e3902c5d21fc8491df67bb37b7503e7e64d68cfa0e9cd5d2b670115ba30acfc
192 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a critical heuristic firing indicates a malicious redirector link to 'https://dafemum.ru/wix?keyword=cities+skylines+rico+low+land+value'. This suggests the document is designed to lure users to a malicious site. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dafemum.ru/wix?keyword=cities+skylines+rico+low+land+value In PDF document text
    • https://cdn-cms.f-static.net/uploads/4460043/normal_6039cf4ba2170.pdfIn PDF document text
    • http://otshelnik.net/manhattan_review_gre_analytical_writing_guideg1s7b.pdfIn PDF document text
    • http://brosbass.com/cid_moosa_songs_320kbpstdimh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389805/normal_6004b046a71a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446496/normal_5ffc1556475ec.pdfIn PDF document text
    • https://gofegupozomo.weebly.com/uploads/1/3/4/4/134479888/3806567.pdfIn PDF document text
    • http://detonicro.website/define_contract_law_uk7vnl2.pdfIn PDF document text
    • https://zoxopabetil.weebly.com/uploads/1/3/1/1/131163737/vubokavum.pdfIn PDF document text
    • https://zokuvulasaxibu.weebly.com/uploads/1/3/5/2/135298812/f3fc9e0b930c19b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478146/normal_5fd1603021038.pdfIn PDF document text
    • http://erogan-oficial.site/40_40_fat_loss_systempnjxi.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/lomogas/graphing_parabolas_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/beautiful_butterfly_wallpaper.pdfIn PDF document text
    • http://zunotewa.rf.gd/zevuxovanofedutosere.pdfIn PDF document text
    • http://zizakipu.epizy.com/60067628965.pdfIn PDF document text
    • http://bufiziwo.rf.gd/77132704556.pdfIn PDF document text
    • http://legifotuvikib.epizy.com/black_boy_haircuts_designs.pdfIn PDF document text
    • http://zakivijojinikij.epizy.com/34909534291.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/44865144141.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_off0000dbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC2 5156 bytes
SHA-256: c0cdd4b956e3ca61cbf0d8d77ad99266e4c79fcda025e509692b8e5116dd3c4e
font_01_sfnt_off0000ed79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED79 12896 bytes
SHA-256: 41603eaf43ff390c5c7eb05ca1ca9e1e230d5d84842f5a57ef8d193350c5c6fe

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