Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e9396f847554ca…

MALICIOUS

PDF

73.7 KB Created: 2021-03-01 08:11:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2009d10a76c83c18e7e535de03d80644 SHA-1: b26502fed19c15546e14521bed1c40d0e8b48ac7 SHA-256: 07e9396f847554ca0762c85ba30085905b0c1e7801842968361b8d67334a4552
184 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were extracted, the PDF structure and URL analysis suggest an attempt to direct the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://dafemum.ru/wix?keyword=internet+research+on+the+brain+answers In PDF document text
    • https://static.s123-cdn-static.com/uploads/4479213/normal_6005f23903ea0.pdfIn PDF document text
    • http://dekiweragaf.mywebcommunity.org/can_you_keep_a_secret_review_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478932/normal_6031747a69ca7.pdfIn PDF document text
    • https://cdn.sqhk.co/tisojubew/gAdiCoo/rodabitubodopum.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/hiyAV7P/pidupenasama.pdfIn PDF document text
    • http://cosmeteca.com/jobumumagamume6pq6k.pdfIn PDF document text
    • https://cdn.sqhk.co/satijumok/6HspFje/86164572951.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/iagdLjh/dirty_pool_game_free_download_for_android.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/kefep.pdfIn PDF document text
    • http://pumaguli.scienceontheweb.net/74028148018.pdfIn PDF document text
    • https://cdn.sqhk.co/kesavaki/1gfgeje/20074746201.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/mikibetiv/gifuvelasegenibakujopo.pdfIn PDF document text
    • http://jilutuve.rf.gd/wwe_bleacher_report_smackdown_live_grades.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/csu_job_application_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/garmin_430w_simulator.pdfIn PDF document text
    • http://juxudawalugevop.epizy.com/50105479856.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_off0000e40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40B 5024 bytes
SHA-256: 87d684e79db0fc88b8517b08f12b9398b9250c26032c90e2b16a5f1c154dd12e
font_01_sfnt_off0000f52c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52C 10764 bytes
SHA-256: e1f19a167bff69c59275345428c7b2f1979ffe618fe6bd438f2080d06918bc0f