Malicious PDF — malware analysis report

Static analysis result for SHA-256 406a630d3cbca957…

MALICIOUS

PDF

74.0 KB Created: 2021-03-21 22:37:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9c0baa177178b673ca6caed15aa4abc2 SHA-1: de1b7df0c66ce7667c4535fdd3820e4b5d55b3c8 SHA-256: 406a630d3cbca957d044c02b10f74b235e8a09faa08f1252659c1242dfbfa5e0
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to popular search terms. The presence of multiple disposable hosting domains and links suggests a phishing or scam campaign aimed at redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://crophysi.ru/award?keyword=warhammer+40k+deathwatch+codex+pdf+vk In PDF document text
    • http://surevixa.22web.org/vifimudaki.pdfIn PDF document text
    • http://mowogaw.mypressonline.com/aprender_a_desenhar_mang.pdfIn PDF document text
    • http://jisetatiloro.scienceontheweb.net/20439665215.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/arunima_sinha_book.pdfIn PDF document text
    • http://kuxogajow.iblogger.org/mepajos.pdfIn PDF document text
    • http://moxupasasitote.mywebcommunity.org/c_s_lewis_books.pdfIn PDF document text
    • http://jolidulikan.scienceontheweb.net/29957771829.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/sexual_orientation_definition_apa.pdfIn PDF document text
    • http://fozivot.mypressonline.com/86339206169.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/94746708920.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_b9e1bf0002ed42d1b7bb9f4b4dec52b4.pdf?index=trueIn PDF document text
    • https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_146300ef2e464c04b3fcc3a4895e05f3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/97140620846.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/vogizesedutulizo.pdfIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_547feb06ed3a45668cec6decdd0cb52c.pdf?index=trueIn PDF document text
    • http://dafoxep.rf.gd/gelufexifodajeki.pdfIn PDF document text
    • http://xumerapugegivo.epizy.com/jesizurizelisegulesup.pdfIn PDF document text
    • http://wubonaxe.epizy.com/set_background_colour_java_android.pdfIn PDF document text
    • http://kosiwamirofakad.rf.gd/cambiar_de_word_a.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/jagomajapel.pdfIn PDF document text
    • http://wotalajo.epizy.com/axial_skeleton_system.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/how_to_develop_android_app_using_netbeans.pdfIn PDF document text
    • http://seroritubofa.atwebpages.com/39103157214.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_off0000e098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE098 5712 bytes
SHA-256: ba4c6f4c1ea32fbde2d394ae636940d61f41fb8226507b5715766c02cc2157a8
font_01_sfnt_off0000f3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FF 11128 bytes
SHA-256: 217fc95903aea15fcfce524be3394b2c388320ac115ec606dccd59c498b46f62